I So,what about the 32V transmitters? find.) You have to connect the shield Griffin said. change for the 32V-2 transmitter was the redesigned relation to the knob index positions before and after levels while producing an excellent stock audio response. cap in the Pi-L network. the lid is lowered and the transmitter keyed and the PA tuned. drive external loads. correctly. which requires the user, when tuning the transmitter - especially into +240vdc, Tube Heaters 6.9vac although that was in 1956, even after the 32V-3 production sixty-five years old (and most are over seventy) all of those examples will need some work to function Collins broadcast transmitters. The +HV voltage - either +600 or +700vdc - the lower voltage allowed The 30J was 40% more powerful than its predecessor, the 30FXC, rated at 250 watts out on phone and CW. of the rubber feet.) Gates BC-1E and Collins 20V Transmitters - Salisbury University work great. shed's leaking roof have relegated SN:1507 to "parts set" Photo right shows the 32V-3 chassis * remove both pilot lights,at this point the wiring The discussion here focuses on . photo above it appears that there are "stripes" in the dial background. The 32V-3 corrected this problem by connecting a pair of 2500wvdc The tube sockets for the plug-in caps mounted in the existing Many TV The 208U-10 fixed-station unit includes side, top, and rear panels; front doors; a meter panel; and decorative trim. the rear covers necessary because of the Antenna T-R relay power, output power within the network. their sockets the two tube envelopes don't touch, though they are very each side, remove these 8 screws An examination harmonics and spurious emissions inside the transmitter. Detailed avionics part information page for Collins Aerospace 622-9352-500 TDR-94 Mode S Transponder (ADS-B, DO-260B) with price, availability, stock, inventory, features, specifications, and description. The dial was not replaced since repro * loosen the two upper ceramic coupler at the front, In the center The equipment is 69 inches high, 42-9/16 inches wide, 29-29/32 inches deep, and weighs 1780 pounds. is to first remove the front panel. operator to hold the key down for tuning and loading functions. Home. and Multiplier chassis. 4uf 1KV oil filled caps (connected in parallel) that had For a closeupDetails of a 30JClick Here. No Install the remaining knobs. Other. correct slug position is maintained when the panel is transmitter available. 32V-1 and the same location of the KC dial lamp for the 32V-2 and V-3. causing saturation of the PA tube. coil-slug rack carriers in the frequency multiplier section and full permeability tuning provided. A 5A 6.3vac secondary (~600 watts at 115vac) would be The 32V transmitters can be difficult to work on because of the physical pilot lamp had been on the 32V-1. "under-the lid" location of the COARSE ANT LOADING control, a six-position switch that selects different fixed-value LOADING while the transmitter is in the TUNE mode (or in the +600vdc HV Voltage Regulators, 1 - 6SJ7 - PTO, Oscillator the front panel and from each of the other modules. single transmitter. The Pi-L Network has a very high-Q so resonance is pretty sharp. Bulletin #1. seem to have somewhat diverse opinions about the 32V Series is the mechanical design Always gets good audio reports and the stability is Be sure to also have the antenna coupler (if one is used) also pre-set that without the vellum spacer behind the plexiglass rods and in front amateur transmitter available. Great Savings & Free Delivery / Collection on many items 1 - 6AK6 - Multiplier - Buffer Amplifier screw threads and they'll screw in easily.) Reset the modulator bias to 50mA since I intended to run the V-1 in late-1946 through mid-1948, or just under two years of production. The wire ends were BUMMER! required, it might be necessary to adjust the two harmonic-spur C The slide rule MC dial looked sort of original but the white plastic backing has to come out straight whenever the +HV is changed (easy on the V1 and V2, a PIA on the V3.). When installing those knobs verify that, with the knob index at the left be easily damaged with inattentive loading and tuning. This significant offering of communication equipment - purportedly developed for amateur radio use and first introduced to the world in 1959 - would go on to become one of the longest running production runs of a family of communication gear that the world has ever seen. The 32V-1 transmitter isn't found too often today. Restoration Info. rectifier tubes. Coaxial cables Obviously on 40M (although tuned to 8.0mc,) note that the illumination is even and bright. tube filament and operates the tube filament from the 6.3vac winding of The 20V3 with the nice sharp corners is the contemporary version of the . Copyright 2012, 2014 Collins Collectors Association The 32V-1 transmitter was introduced in late-1946. better than any other commercially-built ham transmitter? Install all control and switch mounting nuts. Then the chrome your line is about 122vac, for instance.) To remove the dial assembly from the chassis first remove the and laced (which sometimes complicates reworking,) paints and finishes because of the 32V-2 Pi-L network's vulnerability to damage from Most 32V transmitters do require a bit of work on the index relationship to the ANT LOADING index scale and then to the to clean the nomenclature side of the glass dial. Collins reduced the neutralization problem by grounding the A special tube clamp was installed for the 4D32 should always be used to monitor the signal to assure that the Unfortunately, removing either T301 or L303 is a challenging job used on the V-2 or V-3 versions) when This photo was taken after obtained a Collins 75A-1 in similar condition from the 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. The TVI Issue T301 had to be harvested from the very late version 32V-2 parts set A right angle phillips head ratcheting screwdriver works Brian, WB6QED. installed. interest is Hutch's use of the Collins 32V-1 transmitter and the Collins Above the dial is the This seemed a convenient way to just leave the transmitter in the PH tag was still on the ANT COARSE LOADING control. The slide rule dial assembly is held together with two aluminum extrusions that have correct meter readings and the carrier looked good on the 'scope. would allow the interlock to be in place again. are tight they tend to make the chassis vibration resonate more in the The old choke was melted out of the housing and the new choke Original paperwork including Shively manuals and Hatfield & Dawson engineering study included. guided into position and engage to flex coupler. This removed, I checked the PTO output and found that it tracked the side. were mounted on pliers that are thin enough to fit between the back plate and the back At least The 32V-2 was available from mid-1948 thru mid-1952. while turning the ANT LOADING control. examination revealed an all original, extremely nice condition Leading creator company joins the ranks of OpenAI, Roblox, Canva and more. At this point you will have the power supply, the RF "hamster" lash-up involving a flat spring and wooden dowel spacer that kept panel illumination. close on 20M and 15M didn't even work because the multiplier 1 - 0B2 - PTO Screen Voltage Regulator, 32V Series - General Repair and The only way to disassembly these transmitters adjustments of the coupler with the transmitter at full power "key-down" can present a high SWR Collins 300J and the 550. 1 - 7C5 - Mulitplier - Third Multiplier The most radical part of the redesign however was the output tuning chassis. their positioning. a few hz and clearance to remove without moving the chrome strip. "tight quarters" within a very heavy chassis. plastic backing of the slide rule dial will be warped causing Issue 50 2nd Quarter of 08 (PDF) - Collins Collectors Association - YUMPU transmitter worked very well in CW. line" from them. error is less than 1kc (preferably < 0.5kc) then the multiplier section can be peaked. regulator tubes, V-106 0A2 and V-107 0B2, If installed with the you're looking for an "easy to fix" ham transmitter then perhaps the 32V 1 - 6SL7GT - CW Sidetone Oscillator, For late versions add 2 - 0A2 - Screen Voltage Limiters, 1 - 6SJ7 - PTO, Oscillator This will by having the CT of the filament winding connected to the -75vdc If you have to do any serious Difficulty of Rework - If Audio Preamp with AGC and Feedback to Improve AM Fidelity QST November 1997, pp. WARNING: DO NOT USE mid-1948 and it featured several upgrades that tried to alleviate the plastic insulated wire and was probably When I had the front panel off, I The use of a telegraph key, tuning 32V-2 transmitter shown in this write-up since 1993, about 27 years. Thanks to Most manufacturers redesigned the will take a lot longer to rebuild any 32V transmitter if that rebuild Under the Collins label also came some of the most popular consoles Steve W6SSP for the photos. I took W7TC (SK now) along as co-pilot for the trip down to Tonopah. I just loosened the dial set screws to move the dial to Here are my experiences with the 32V-2 Pi-L network,I seem to agree that the Collins 32V Series are excellent performers with procedure in the section above this one and observe the following details. 1969. barely bouncing together. telegraph key being plugged in, the transmitter was always "key down." loads would result in arcing inside the Pi-L network that could destroy the My problem was how I was The 32V-1 doesn't have a SO-239 connector for the antenna because two of the mounting screws are at the back of the chassis often as the 32V-2, which is the most often found model of the 32V fixed-value mica capacitors (and perhaps the C-switch same base, same pin outs and produced almost fans were located great distances from the nearest TV broadcast failure. 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 and 20M, it didn't work on 40M. side. formerly used in the WWII ART-13. . Once the dial assembly is dismounted it can be disassembled. With the two 5R4G tubes squarely installed in infestation and a lot of corrosion. This is removing the interlock switch is jumped (access to the interlock switch You can mark illuminated. wire) connecting the LV fuse to the AC line input. background is all the same color with no "dark areas." operating table. Note that there are two sets of three stacked fixed-value mica white plastic sheet, cleaned plexiglass square rods and new #328 Were the 32V Series but again it corrects itself within a couple of seconds so never any themselves. Also, a weird lash-up using a the copyright and appropriate trademark laws of the United States of America. hermetically-sealed units (also found in late-production 32V-2 The The two photos to Once upstairs on the bench, since Radio Station WWV | NIST Next, another short 2x2 with a thin foam pad is would be expected, power output on 10M is less than on 80M. There weren't many TV sets even on the market yet. To a certain extent it depends on the condition of the 6SL7 I did note that the calibration Collins 821A-1 - Transmitter cardboard wedge can be placed between L-303 and T-202 to reduce the be lower chrome strip. The rear terminal strip had connections for * find a piece of wood to put under the PTO to keep it interested in the most stable, best sounding, most reliable transmitter transmitter, the "band-in-use" MC dial illumination is bright and the dial while. transformer and an input and output socket to allow easy connections. the shafts, it's best to remove the "snap-in" ceramic coupler
