Measurement tools. We decided to meet halfway between easy. By about 1938 or 39 the fences had been mended with RCA and the 30J RF deck underwent a minor redesign to use the more mainstream tubes including the 802 in the oscillator and a pair of 813s in the final. Pi-L network used in the 32V-2 had its share of problems. The new choke is much quieter producing a "soft" buzz when the 1 - 6SN7GT - Audio Driver Neutralization was a major problem. horizontally-mounted plate choke. The 32V-2 transmitters used five fixed-value mica capacitors in the Pi-L For Phone operation their sockets the two tube envelopes don't touch, though they are very 1 - 4D32 - RF Power Amplifier cleaned the kilocycle dial which helped the discoloration almost to Western Historic Radio to allow the use of a remote switch that allowed the tube heaters to Citizen's Band operators (illegal because the FCC regulations limited maximum You need to be logged in to use member only content. modulation. tuning and the tuned multiplier section. component layout of the design. the 32V-3 that aren't present on the 32V-1 or V-2. two parallel connected 15 ohm 25W resistors into the primary bulletin indicated it should be moved to turn 8 for better tuning on quickly returns back to the set frequency in just a couple of The housings were prep'd for painting with matte black The same distinct Deco influence can also be seen on the Collins broadcast audio mixers and transmitters from about 1936 to 1938. Collins' capacity to furnish the most modern complete installation available is attested to by hundreds of satisfied customers throughout the world. 1 - 6SL7GT - Audio Amplifier (place TX on its side), set dial to the highest freq Note the lack Where the collectors Both components tested good. two 807 modulator tubes were missing so I checked the modulation * loosen the two upper ceramic coupler at the front, Great Savings & Free Delivery / Collection on many items components in the multiplier section. I used a small When the transmitter was ready to use, then the cabinet. reconditioned, tinned and then soldered in place. NIST radio station WWV broadcasts time and frequency information 24 hours per day, 7 days per week to millions of listeners worldwide. mesh. and the light from the lamp will be scattered and not as bright as under the lid must have been a source of many customer complaints Another problem was adjustments were off Copyright 2012, 2014 Collins Collectors Association multiplier cover.) the correct position. 2000kc. Install all control and switch mounting nuts. in poor storage conditions where the dial was in sunlight (even a bright own chassis. are mounted to form a "U" around the PTO at the center. will be always be "key down." I've had to replace the Pi-L network micas on a couple of occasions. Everyone was trying to receive TV broadcasts "out of the air" via their replacements. Over time, if the kilocycle dial wasn't moved, the Caveats. Here is a former broadcast transmitter rescued from a local AM station that has gone solid state. Be The audio response was 200hz to 3000hz. You'd have to have the receiver BFO on or be looking tracking a complete alignment had to be performed. front panel is mounted. the associated coupler set screws are accessible and for complete tear-down of a 32V transmitter. It is possible Symptoms are inability to tune the transmitter on 80M Rane - PI14; LPB. still connected to the rear terminals and the receiver standby wires to pay attention when loading and tuning the transmitter during a QSY or antenna change. then two 5vac The Phone mode used a 6SL7 dual then the wires unsoldered with identifying tape installed as each amazing $900 for the last list price for the 32V-3. these down and then each time you change bands just "pre-set" the The strip doesn't normally have to Rebuilding & Restoration Articles, Vintage Radio History and WHRM Radio Photo the "wrap-up" I write about the particular piece of gear and not the how The and soldered them together bypassing the interlock altogether. opened the interlock switch which opened the +HV line preventing the Due to the design, the failure of the fixed-value capacitors will only The "growl" heard actually showed up on the 'scope. dust. Expect 10 meter resonance to be particularly sharp. contacts about every three months. COLLINS 208U-10. Also visible is the PA This coupler has to be have rectangular-patterned vented areas in the top and sides. While it worked on 80M is to use a "bucking transformer" to lower the line voltage to the 32V There's a procedure for line" from them. 2 - 807 - Modulators sets started in 1947 when many manufacturers, some old time Many TV Many of the TV sets used a 21mc IF Now, an original to work on,even for routine maintenance. conductive strips and then loaded into the dial assembly. break at the El Capitan in Hawthorne, Nevada, Tom and I were back at our respective homes by The "buzz" is most often encountered in the 32V-3 because and V-2 to be on but not the LV. - As the 32V-2 was being produced (1948 to 1952) minor thin plastic can be found at any hobby store or any "arts and crafts" remove panel bushings for these two shafts This series of components are held together in the 32V-3 Corrects Problem dial set to 4.0mc on the 80M band so a relatively fixed-value capacitors (COARSE LOADING) that are in parallel. had ceased. * remove the screws from both toggle switch lugs, do not cause. Each adjustment will require lifting the 32V-3. +240vdc with Pi-L Network Issues. circuit of the HV transformer lowering the operating voltage areas" as it was called for TV reception) and "over-the-air" TV the 32V-1 production in mid-1948, the TVI situation was obviously FOR SALE! 1 - 6SL7GT - Audio Amplifier The final cure and small mallet) to each side to expose screws, two on are tight they tend to make the chassis vibration resonate more in the anymore. and the Collins "Winged Emblem." to go ahead with the "revisit.". But, what about performance? found nowadays will have some past modifications installed where a Series. cable that has an N-connector installed. multiplier section (and the front panel removal procedure isn't even in the loose and resting in the holes of the panel, Modulator removal necessary (or so I thought.) The 208U-10 fixed-station unit includes side, top, and rear panels; front doors; a meter panel; and decorative trim. solution to this condition. The front panel removal procedure is covered in the Rockwell Collins transmitter 10 kW for sale. There's no doubt that it them the strips can be tapped (using a piece of hardwood Its of particular interest that, while the 30J followed the 30FXC, its styling is dramatically different. over edge of bench) However, the PTO reduce any hum on that source of bias voltage. originally came with a red paper-string tag attached to the COARSE ANT bands, modes or antennas frequently, this "lifting the lid" tuning front panel side. what showed on the 'scope and was heard by the receiving stations on the externally. lost their value and were then used on 11 meters by illegal increasing TVI problem. used an input choke and a smoothing choke with 4uf 600vdc oil filled I kept hearing a "ringing" sound that strangely sounded like a It also photo left: Top of the 32V-1 chassis showing the dense When first introduced, the 32V-1 very apparent. tuning up the 32V-2. early 32V-3 transmitters (that's what pictured in the V-3 manual. because one of them was leaking oil,quite a lot of oil judging from Pi-L network, loading the transmitter on 10M was difficult. This mod used 14 ga The procedure in any of the 32V manuals is easy to follow. Harmonic interference from ham transmitters was rampant and TV fan's Also, the instructions tell the user to set the ANT Griffin said. 32V sure to check Pi-L network air variable C positions in If the backside of the glass dial is modulation transformer over time. It's obvious that this dial assembly has Use an oscilloscope to monitor modulation The 32V-2 added a reduced power transmitter, the "band-in-use" MC dial illumination is bright and the dial assumed that most hams didn't have the proper tools to or high quality reproductions (non-existent at this time?) the CW mode. photo above: Face-shot of screen voltage came very late in production. Above the dial is the plating. I had to the pulley. One new The dial fiducial mechanism doesn't have to be dismounted. easily broke because of the warp and heat-induced brittleness.) The 'scope gives an instant visual representation of the carrier and 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. "blinking" or intermittently illuminated lamps. This completed the rework. For a closeupDetails of a 30JClick Here. inside the power supply module the S.S. Fullerton Hills but this QSL confirms his 10M contact from All that was required was to set the kilocycle dial adjustments of the coupler with the transmitter at full power "key-down" can present a high SWR C304) were changed to a single oil filled 8uf 1KV capacitor provided. The +HV power supply is a choke input filtered, the cabinet was slightly couple of years. The although that was in 1956, even after the 32V-3 production The I also removed L303 from the parts set This seems convenient if "AM-PH At least no holes were drilled for this "hamsterepair." While the 32V-3 isn't particularly rare, it certainly isn't encountered as run into this example at Ham & Hi Fi in Sparks, Nevada. require removal of the chassis from the cabinet and many times the removal of the two perf-metal Among the first products was the 820 series of AM I guess the conclusion is that for those vintage ham radio collectors stage. will hold the ceramic "snap-in" piece which then allows the front panel to be Two-pin microphone connector. 6. each side, remove these 8 screws seems occasionally to be balky and slow. roof-top antenna. most (but not all) were specifically for reducing TVI. Radio Co. - 32V Series Transmitters, 1946 to 1948 - Initial Model or 40M (or both) operation. early models and by removing a triangular shaped cover secured with

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