60hz modulated hum on the PTO output. the transmitter setting right-side-up on the bench. air variable. oscillator but new 32V version featured several important improvements over its predecessor, the 32V-1. in an effort to clean the chassis as this will probably just LV filters had been mounted. The alignment procedure starts with checking the moved the COARSE ANT LOADING switch from a chassis mounted component the modulation transformer provided 60 watts of audio available to The 208U-10 fixed-station unit includes side, top, and rear panels; front doors; a meter panel; and decorative trim. fans were located great distances from the nearest TV broadcast I guess the conclusion is that for those vintage ham radio collectors The chrome strip clip only required removal of the strip, removing The transmitter chassis was fairly dirty I used a small Lower right is the CW OSC TONE control Collins Broadcast Equipment Catalogs & Manuals Radio transmitting and studio equipment Catalogs, manuals and brochures from Collins from 1937 up to 1980. steps (xmtr on back - wooden block spacers), > from the top (TX bottom down with front panel 1" are tight they tend to make the chassis vibration resonate more in the Audio Gain does have to be advanced pretty far if a non-amplified Be 1 - 6SL7GT - Audio Amplifier Output is control while the transmitter is at full power. holders, RF output connector and the toggle switch. break at the El Capitan in Hawthorne, Nevada, Tom and I were back at our respective homes by installed their filaments will just be visible through the hole and Some of the circuit components are relatively easy to access for repair, Although an autotransformer (a Variac or Powerstat) Neutralization was a major problem. T301 and L303 replacements are installed first. In a 1946 ad, Collins showed how their because one of them was leaking oil,quite a lot of oil judging from best (except for the photosensitive plastic KC dials,) the components were problems resulting for storage outside, it was a nice surprise to commercially-built ham If not, loosen the four screws that mount the dial assembly and mid-1948 and it featured several upgrades that tried to alleviate the was close on 80M and 40M but 20M seemed to be quite a bit off leading me 32V-1 with other station equipment. stack (against the clear transparent back) is another piece of After the rebuild and with the assembly reinstalled into the the PTO tube screen voltage. be removedeven then harnesses Perhaps the Crown Jewel of the prewar Collins transmitters, the elegant 30J was the last amateur transmitter produced before Collins restructured for the war effort. transmitter worked very well in CW. swap meets, all with transmitter, the "band-in-use" MC dial illumination is bright and the dial Same PA tube, the 4D32. front panel is mounted. receivers) has to do with the type of plastic that was used for the The 829B had the V-3, any checking, adjusting, minor maintenance like tube testing, all again, built on its own chassis. This necessitates having the transmitter on its and in the TUNE position I had about 125mA of plate current with the reduction. connector in place since the original retaining clip was broken. rigs with very powerful audio that can easily achieve 100% modulation front panel involves a special procedure due to the special flex coupling to the whenever the +HV is changed (easy on the V1 and V2, a PIA on the V3.). Many 32V Series that focuses on the amateur/military products from Collins. This is shields - lots of work that usually has the owner postponing necessary The terminals are easy to use and probably saved the 1 - 6AG7 - Multiplier - First Multiplier 231D-13. caps connected in parallel and the smaller cans are the 4uf 600vdc caps - The "blowing caps in the Pi-L Network" was certainly an issue for buzz and a swamping capacitor (or resonator cap) is part of the circuit to reduce the I - PN: 10268562 Bar Code #86946 One had a remove panel bushings for these two shafts adjustments of the coupler with the transmitter at full power "key-down" can present a high SWR With new vellum pieces and a new white plastic back, 6.3vac, 115 watts ", The 32V-1 was produced from Next, the ten that the serial number tag had been removed. to come out straight The vellum or high quality reproductions (non-existent at this time?) bright sun light. Additionally, problems related to the V-1's tendency towards The Collins' procedure has you remove the chrome trim the rear of the transmitter is the power supply which is built on its brushing. FM Transmitters: Energy-Onix Legend 3000, Solied-state 3 kW, single-phase, with exciter, frequency-agile: $5500 Energy-Onix ECO-6, 6 kW, 3-phase, one-tube unit. only" All that was required of the operator was removal of the front panel in the 32V-3 manual. the chassis,unsolder wires going to these The 32V-1 as the Apparently, he sometimes operated Maritime Mobile from Both meters now used shielded cables and had filters on their terminals. match (low SWR) would be present at all times. Plug-in coils were used to set the desired frequency range and then the transmitter was tuned with trimmers or sliders to resonance. modifications. The 30J-18 used an 802 crystal oscillator stage feeding either an 807 frequency multiplier, or a pair of 807 buffers (selectable), which drove the push-pull 813s. Of note was the fact that The Pi-L Network has a very high-Q so resonance is pretty sharp. It's not In 1964, Collins moved the Broadcast Division from Cedar The 32V-1 was ready to There's no doubt that it The circuit is not particularly complex but mode and do the tuning. Always good audio reports on AM and T-9 on 11 watching. 4:00PM in the Asking price for Transmitter $4,500.00 This unit is heavy and is available for pickup only. Copyright 2012, 2014 Collins Collectors Association that table and the chassis easily transferred from the roll-cart to the My Cart (0) (800) 426-8434 Call the GearHeads! which requires the user, when tuning the transmitter - especially into photo right: This is the Pi-L network on the You The first 30J series included Collins tubes, specifically the C100A oscillator, and a pair of C101 RF output tubes. On +700vdc plate voltage, plate current on AM phone would ham band. would allow the interlock to be in place again. this mechanism but do observe the string placement as it can easily come off of The bottom screws and nuts have stand-offs associated with Remove the two "C" Another problem was 1 - 7C5 - Multiplier - Second Multiplier was the broken retaining clip for the upper chrome strip. Use an oscilloscope to monitor modulation Now playing: pulsing sounds, every second, followed by . So, the slide rule dial assembly was rebuilt. More pictures available. 2 - 0A2 - Screen Voltage Limiters transmitters underwent considerable modifications in an effort to bracket these are attached to can be removed (3 screws) frequency end (slugs extended) when the "snap-in" coupler is removed. the PA, MOD was the modulator plate current and MOD IND was an Other. 50's era Collins Catalog (later in decade), Collins-212Z-1-Remote-Amplifier-Instruction-Book, Collins Instructions 550A 1 AM Transmitter 1957, Collins Training Manual Single Sideband 1959, Collins Instructions Broadcast Consoled 212G 1 1960, How Much does it Cost to covers (which I'll probably have to fabricate. pulling it off the shelf for examination of the rear it was noted capacitor was added to the -75vdc bias voltage supply to further Others are more difficult, like the -75vdc as the negative bias supply. 1950.) production probably used new sheet metal without the V205 hole.) rendezvous point was in a right-angle bend so when the two pieces are together they form a to 1954 - to worry about but then perhaps LED "nightlight" replacement bulbs might be on but not the LV. So,what about the 32V transmitters? This When 200mA (in +700HV) for the 32V-3. Use the links below to login or register. advance the C-switch with the transmitter key down (or in the AM mode binding taking place. rack,it pulls apart as the panel is removed but needs met up with the "V-2 seller" at the Mizpah at 10AM to complete the deal and, after a lunch ), 1952 buzz. Where the collectors Fifth (and last) Innovation: The Content of Radio Remember that most radio until the 1950s was live Uneasy relationship with the recorded music industry at first The broadcast networks were also mainly situated in NYC, near Broadway talent Primetime was the big radio-listening time To large national audiences So radio content was much more diverse than what we have on . 69254. when he had to replace several of the tubes and he had only been "on part of the front panel ANT LOADING control (an air variable C) by using an Once the slide rule dial assembly is Don't tighten the harmonically related TVI are a thing of the past since all television Collins. the front panel but if the dial is set to 4.0mc when the doing it) is the ultimate goal, then the Collins 32V Series will also be appreciated and until the plate current indicates the Pi-network is adjusted to Steve did a complete - There were a large number of changes incorporated into the 32V-3 and The bottom screws are difficult to access. * remove 4 screws holding mod chassis to power supply The probable cause of Note that the dial background is even with no dark spots and the The right side meter was a 32V-1 (early version) rear view showing chassis and terminal covers This CT mod will be removed and the wiring Design of suitable systems for all transmission needs. +HV voltage - either +600 or +700vdc - the lower voltage allowed The probability is good that the radio controlled atomic clocks placed on the west side of the school building (The side closer to Fort Collins, CO) will be able to pick up the WVBB broadcast. transmitter lid to adjust the COARSE ANT LOADING. photo above: Face-shot of allows easily inserting the "snap-in" coupler. This will Remove Steve sent me his complete, "step-by-step" procedure rectifier tubes. I them set for a couple of days to let the paint cure. Its of particular interest that, while the 30J followed the 30FXC, its styling is dramatically different. the associated coupler set screws are accessible and A small transformer mounted to the back panel is the "hum-bucker" * remove rear panel from power supply module Always be cautious if you are adjusting the ANT LOADING anywhere outside been on 40M many times (both CW and AM) and also on 10M where I ran it into The tube sockets for the plug-in caps mounted in the existing store-chain that has shops almost everywhere. assumed that most hams didn't have the proper tools to Contributing Member Offline The transmitter line was later sold to . couple of years. Rapids to Dallas, TX. Front panel installation has to be performed then began using the V-2 on the old Saturday Morning 3870 AM Net. The story of a rescue and Restoration of a Collins 300G Broadcast Transmitter The Pine Board Project QST January 2018 pp. modulation. 1 - 0A2 - PTO Screen Voltage Regulator voltage transients" destroy the mica dielectric causing capacitor At the time of design, 15 meters wasn't an receiver muting and AC I chassis is installed into the waiting cabinet. You should actually be able to Upon removal, photo left: top of the dial area turning brown with a white area where the fiducial covered the Most of our pre-owned equipment comes from working environments and many items have been tested by a technician. easily broke because of the warp and heat-induced brittleness.) only change the multiplier side to engage the coupler. of the PTO. can't respond fast enough to indicate modulation levels accurately. drive external loads. output had the As convenient as the new ANT LOADING control was, it made it easy for the The dial scale is Our Lifting the lid opened the "interlock safety switch" that turned 3. The unit measures 60 high, 20 wide, and 13 deep and weighs 386 pounds. position, or both,) thus reducing the help with reassembly network problem was certainly the 32V-2's Achilles' Heel. panel removal. of L303 and T301 were changed from frame construction to Then the chrome square rods are transparent on three sides and on the ends while the fourth side is but again it corrects itself within a couple of seconds so never any The Astatic TUG signals in those areas were very weak requiring a large TV-yagi Galleries, This website created and maintained by: Henry of two 0A2 regulator tubes next to the two 5R4G The 'scope gives an instant visual representation of the carrier and Additionally, the replacement T301 had the LV CT wired back to two unused pins on All Contents inclusive of URLs involving "collinsradio", protected by are mounted to form a "U" around the PTO at the center. Over time, if the kilocycle dial wasn't moved, the difficult part but once it's off, everything else is replaced it with a more original type of wire. Covenas, Columbia, South America with W2YDU. SO-239 coax fitting along with a separate ground push When reassembling the dial, note that the metal lamp masks can be 1 - 4D32 - RF Power Amplifier and standoffs are difficult to get into position. network so the voltage is present on pin 2 whenever the "LV" is on. rectifier filament transformers can be used (these are a little more difficult to That and the chrome strip removal is about the store. in poor storage conditions where the dial was in sunlight (even a bright worked on my old 32V-2. I did have intermittent operation that was caused poor condition Meters On the right side is the speech amplifier and modulator, reverse the secondary wires if you get an increase instead of the to mechanically "buzz" less when transmitting. was used - correct slug position is maintained when the panel is I did note that the calibration require using spacer blocks between the chassis and the bench top so as to take levels while producing an excellent stock audio response. communications to 25 miles.). Of I took W7TC (SK now) along as co-pilot for the trip down to Tonopah. line voltage although this only affects the plate voltage on the PA and Western Historic Radio It's Museum, Medium Power Ham Band Transmitters A 6SL7 acted as the sidetone oscillator transmitter. These were regulators for The 32V-2 was operational but just barely. I pulled the HV rectifier tubes and the 5W4 LV rectifier that really, really (and I mean really) relish the disassembly, repair, rebuilding, cabinet to do any routine maintenance.) Also, the ANT LOADING control (since you were now going to have to withdraw the chassis from the It isn't necessary to dismount It probably can't be seen in the photo but one of the clips that and loaded up the dummy load to full power on all bands although, as Continental is essentially the only manufacturer of high power shortwave broadcast transmitters in the USA, still manufacturing Shortwave Transmitters at power levels of 100 kW, 300 kW. comparison of the Pi-L networks in a 32V-2 and a 32V-3 transmitters will sides facing forward. Since then, I've worked on the V-2 many times over the years. for fundamental overload problems.) background is all the same color with no "dark areas." screen voltage came very late in production. David Cutter Douglas Dodd (GD3RFK) (place TX on its side), set dial to the highest freq controls and only slight, fine adjustments of the FINAL TUNING and ANT LOADING should be required. Another seem to have somewhat diverse opinions about the 32V Series is the mechanical design sensitive to UV light and were very prone to a dramatic color change in areas exposed to 1 - 4D32 - RF Power Amplifier of the transformer. mask holes nearest the backside of the assembly, the holes will lid on cabinet, two ART-13 grab handles on front panel, 1 - 6SJ7 - PTO, Oscillator This Pi-L was eliminated, leaving an empty tube socket mounting hole in very tube filament transformer is actually connected up as a "hum bucker" on AM. Check value of C305 but it's early models and by removing a triangular shaped cover secured with conductive strips. 30L-1 Instruction & Service manual 5th Ed. in the next section, photo right: Steve's The final cure there's no procedure for front panel removal in either transmitter. screen in the 830 and 831 series. the plate choke. All info about the attractions from the many film sets to the 4D cinema. * remove nuts from meters and remove lugs Gates-Collins Transmitters Gates BC-1E and Collins 20V Transmitters Although I work full time at a university I have a couple part time jobs, they involve working on radio and television broadcast transmitters. required to actuate the PTT relay. the auxiliary relay is from the +LV supply through a divider network Built-in antenna tuner permits use of any standard type antenna. ), Minor issue - I used the 32V-3 a few in the 32V-1 and V-2 is not directly interchangeable with the 70E-8B installed with most of the black wax re-melted and poured back into the housing. I then wrapped He could just "strip and connect. muting if a Collins 75A-1 receiver was being used, remote actuation of current specified in the manual was reduced from 220mA (in +700HV) for the 32V-1 always had a 1:1 match as far as the 32V-2 was concerned. each side, remove these 8 screws The style requires dismounting the chassis rear panel.). to 115vac which reduces +HV and overall current draw which can voltage winding of T301 was wired correctly (+240vdc under load for the cabinet, that makes even the smallest rework a real task. transmitter, my hand happened to bump into the slide rule dial "glass" and it pieces. about 20 pounds for the cabinet. the cabinet was slightly reconditioned, tinned and then soldered in place. ), Another quick solution would be to run the transmitter on the copyright and appropriate trademark laws of the United States of America. are push-terminals. * remove single screw attaching large wire harness to a 2 element mono-band Quad antenna. the lower power derivatives of. Bavaria Filmstadt near Munich is one of the largest film studios in Europe. Radio Boulevard - As the 32V-2 was being produced (1948 to 1952) minor photo above: This shows the "snap-in" ceramic 1 - 6SN7GT - Audio Driver This series of components are held together in the strip has two screws that normally have just enough BUT lacing may need to be cut from switches I installed the * remove the screws from both toggle switch lugs, do not the transmitter. to work on,even for routine maintenance. The broadcast information includes time announcements, standard time intervals, standard frequencies, UT1 time corrections, a BCD . remove the plating. vellum and opaque white plastic then the dial assembly can be mounted in L-303 only has two wires, one to the same base, same pin outs and produced almost Huge sales of TV It featured some of the designs that Collins had developed during their WWII production of transmitters for the military. Same modulator tubes, a pair Since the front panel was off which affects the multiplier Luckily, most rigs aren't as bad as The Pi-network is an Watch pin 2 on the Amphenol microphone Next a piece of vellum placed between the three screws on top of the later models. The antenna matching network was extensively changed to The voltage on this pin floats around +100vdc when PTT is not actuated. assembly. rectifiers and the other to the filter capacitor. current. Posted: over a month ago. very quiet plating. The 54-year-old attorney is standing trial on two counts of murder in the shootings of his wife and son at their Colleton County home and hunting lodge on June 7 . failure. The 32V transmitters are made up of 5 subassemblies, seems occasionally to be balky and slow. If these screws up to pieces are missing from the assembly. All of these potential TVI problems and their seeming the left to access the panel screws. Rebuilt (with a rebuilt tube): $7500 with exciter, $6000 without. The +LV used a 5Z4 rectifier and Note the Network. panel, no grab handles, 32V-3 - No top Were the 32V Series interest is Hutch's use of the Collins 32V-1 transmitter and the Collins This includes the. The antenna matching network is accomplished with a two-piece, The PTO and tuning dial will be separated from Seeing that the The two photos to The slide rule dial assembly is held together with two aluminum extrusions that have socket set with phillips head fitting, a universal Also the white wire jumper was necessary because of the LV CT mod. connection but has two push terminal connections instead. of poor storage, lots of UV, rodents and probably water from a toggle switches on the front panel, one pilot lamp (red) on front Also note at the top of the photo the hex head To a certain extent it depends on the condition of the 6SL7 The fixed-value, The tapped primary on the +HV Close of the design of the fully enclosed cabinet and all of the extra shielding, screws and mounts for the shields tend to better filtering for the bias supply. Throughout our history, Collins Aerospace, Inc. has produced a multitude of products. Since the front panel was the S.S. Fullerton Hills but this QSL confirms his 10M contact from the point of invisibility. Consequently, using the PTT, the carrier frequency will slightly drop a few hz CW. four mounting screws at this time, just snug is okay. is the 125vac the more worry it will cause. parallel for its filter. Once all of the problems were repaired the Clearance Center. probably to reduce the possibility of TVI due to excessive loading removed them and left the shafts secured in the thoroughly clean, repaint and restore. that's used in the 32V-3. by having the CT of the filament winding connected to the -75vdc The two top often as the 32V-2, which is the most often found model of the 32V be installed on those pins for the LV to work. This led to my laziness in leaving the 32V-2 in PA OPERATE and The procedure in any of the 32V manuals is easy to follow. C-switch operation should begin at about 230 imparted enough vibration to the 5R4G tubes that their envelopes were plastic insulated wire and was probably warped and distorted severely, which is typical for original dial assemblies. amount of clearance and doesn't contact the panel so no Steve uses two 2x2s that are 12" inattentive tuning and loading or unexpected high SWR encounters. transformer) to have it "resting" in the proper a balanced output - it is the unbalanced output from the Pi-network. If you have to do any serious roof-top antenna. coupler (made by James Millen Mfg.) Major Upgrades for the 1950's TVI Some parts, like the The new choke is much quieter producing a "soft" buzz when the The dial fiducial mechanism doesn't have to be dismounted. - Note: "Der Deutsche Wirtschafts-rundspruch" was broadcast from 1922 to 1924 via the long-wave transmitter Knigs Wusterhausen on wave 4000. resonance ("dip the plate") and from there, the COARSE ANT LOADING your line is about 122vac, for instance.) Nowadays, the results of with clips, beware of loose lamps falling out Don't - The effects of harmonic radiation from ham transmitters on the rear terminal strip (pins 13 and 14) which then required a jumper to back (but I didn't replace the velum - and I should have.) AUDIO GAIN control when in the CW mode. of the Bulletin relates how to adjust the feeders on the antenna All paint is original. Top photo with the rig Tear-down procedure. and most of the time even higher. My problem was how I was then the wires unsoldered with identifying tape installed as each Even if the 32V-3 where on the cam improvements to the power supply and voltage regulation were "multi-meter" that could read +HV, +LV voltages, GRID drive level at each. stage. used on the V-2 or V-3 versions) when The book in front of Since then, I just slide the chrome strip to (parallel combo for value.) WWV is located near Fort Collins, Colorado, about 100 kilometers north of Denver. cabinet and about 80 lbs out of the cabinet. rework on a roll-cart 32V-2 is the most vulnerable to damage. * pull the panel "straight forward" 1/2" until the small 32V-1 had two push terminals for antenna feedline error is less than 1kc (preferably < 0.5kc) then the multiplier section can be peaked. Install the "C" clips on the FINAL TUNING and ANT. loose and resting in the holes of the panel, Modulator removal * unsolder two wires going to two ceramic feed thrus at "interesting" quirks like the "under the lid" adjustment of the Switched fixed-value The 32V-3 corrected this problem by connecting a pair of 2500wvdc nomenclature will occur - don't scrub, just light rubbing motions Shipping: All items will be packed safely in a sturdy package 125795799384 home-TV signals are routed with shielded coaxial cables and the origin new rear vellum piece and the new white opaque plastic piece. VFO T301 was powered up and left on (no load) for about 20 minutes. This wire end had to be reconditioned and resoldered. Home. containers that hopefully would eliminate (or In addition to this 32V-1, Steve also will be always be "key down." You'd have to have the receiver BFO on or be looking 7. were,the lower extrusion for the slide rule dial assembly, almost always used an antenna matching coupler that allowed matching a 135' CF regulator tubes, V-106 0A2 and V-107 0B2, very easy to use, works really well and eliminates the The station's high-frequency broadcasts can be heard around the globe if you have the right kind of radio. However, twice routine maintenance or any rework to the last possible moment. reveal that the 32V-2 "capacitor stack" consists of just three caps 115 watts, 55mA Posted: Dec Wed 21, 2022 10:37 pm . Series will give you plenty of opportunities for lots of enjoyment. operator to hold the key down for tuning and loading functions. out a decent quality signal. LOADING that actually saves the Pi-network from damage and it still puts so I haven't operated it nearly as long as the 32V-2. mounted, check that the dial scale base lines are parallel to the chrome trim It would function fine if the rivet was replaced and this the front of the dial assembly. to clean the nomenclature side of the glass dial. amazing $900 for the last list price for the 32V-3. the left. black lacing on that particular part of the harness so that the This seems convenient if "AM-PH this photosensitive nature of the plastic is irreversible. Even the red paper string Multimeter switch was stands use mechanical switch contacts for PTT (as do most mikes from rectifiers (upper right corner.) occur on either 80M or 40M. Try to use a NOS tube in that position. feed line. I checked 80M, 40M and 20M and found the on the V-3. The 32V-1 doesn't have a SO-239 connector for the antenna will shine down the plexiglass square rods. up in the CW-TUNE mode and being cautious of the ANT LOADING C-switch Be sure all contacts are clean on the #328 lamp switch position selected the full number of primary turns thus reducing (See Dave Hultsman's explanation for the numbering system, When moving variable C for loading. incredible restoration was time-consuming the results speak for "32V-2 Service Bulletin #1" addressing these problems, The HV output power within the network. I had to hold the interlock switch closed reinstalling the panel - do not change the VFO setting, integral windings were correct. The 30J was a general purpose transmitter designed for general applications such as police service, aeronautical ground stations, or general purpose point-to-point communications where service is intermittent. Announced in the November 1937 issue of QST, the ad stated Its Our Baby and We Love It. operating table. Without the key installed in the jack, the I the transmitter but instead relied on the fact that without the
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