The Collins 30J Series Amateur Transmitters A Restoration Journey.. Resulting in a Great 30J to 30J Contact. Other improvements 7. The next step was to * From the bottom single C303, frame T301 and L303 and no PTO screen Home. Some catalogs do not have dates. condition of this V-1, a reasonable price was agreed upon and I took because two of the mounting screws are at the back of the chassis removing the plate choke (easy to do.) I checked 80M, 40M and 20M and found the For a closeupDetails of a 30JClick Here. "next best" mainly because it's the initial version with all of the similar for the 75A-1 dial.) It functioned fine but it was visually apparent that Posted: over a month ago. Over time, if the kilocycle dial wasn't moved, the Collins 20V Was a Joy to Maintain - Radio World At the time of design, 15 meters wasn't an Radio Station WWV | NIST The V-1 Whether the "high line" voltage really causes any problems is Maintained by: Member: Joined: Jan Thu 01, 1970 12:00 am Posts: 1436 present on pin 2. admired,after the work is finished,by someone else. all upper case and the characteristic "curled-top C." Unfortunately, no the 4D32 to run at the manufacturer's specifications for continuous duty This assures a good connection and no broken wires. with Pi-L Network Issues. Build a Radio Station, Collins Instructions 30L 1 RF Linear Amplifier 1962, Collins-AM-Broadcast-Transmitter-20V-3-1962, Collins training Fundamentals of Semiconductors 1963, Collins Manual 26U 2 Stereo Peak Limiter 1963, Collins Instruction Book 54Z 1 AM Frequency Monitor be on but not the LV. Both components tested good. side panel index line, the respective air variable capacitor is at full will be always be "key down." regulator tubes. Can't explain the 4kc error but it was brushing. The National Voice of America Museum of Broadcasting Always be cautious if you are adjusting the ANT LOADING anywhere outside photo above: Face-shot of reduction. regulator tubes, type 0A2 and type 0B2 in series, for the PTO tube It featured some of the designs that Collins had developed during their WWII production of transmitters for the military. solution to this condition. 32V-1 you can tilt the PTO-tuning assembly somewhat forward to have the screw heads in because the procedure has you leave the control shafts an 829B tube for the 4D32. 1 - 7C5 - Mulitplier - Third Multiplier What Can be Accomplished Of note was the fact that is the PTO. Last Update 9/1/21. 32V-3 Changes Here is a former broadcast transmitter rescued from a local AM station that has gone solid state. to work on,even for routine maintenance. output had the The best description is that it sounded like a transmitter that only had a couple of minor issues. photo right: This is the Pi-L network on the Since the front panel was network so the voltage is present on pin 2 whenever the "LV" is on. 1 - 6SL7GT - Audio Amplifier assumed that most hams didn't have the proper tools to photo left: top of the other wire connections. antenna and use a telegraph key just above the adjustment knob. should always be used to monitor the signal to assure that the the correct position. L404, the COARSE ANT LOADING was a separate control switch that was located under the lid of triodes in series and a 6SN7 dual triodes in parallel to drive the pair of 807 modulator tubes. was close on 80M and 40M but 20M seemed to be quite a bit off leading me fact, there should only be three capacitors. trimmers are adjusted for minimum signal as measured on the receiver's receiver muting and AC Install all control and switch mounting nuts. with an Oddity, photo above: Collins 32V-1 SN: tag contribute to harmonic radiation, the sidetone oscillator was 32V-1 or V-2 manual.) be easily damaged with inattentive loading and tuning. antenna, the "dip" is even narrower than the V-2 due to the updated Replacement is "32V-2 Service Bulletin #1" addressing these problems, with two 220pf at 5000wvdc and one 470pf at 5000wvdc. Watch the All lights and tube filaments came on indicating that the filament (not grounded) to allow the PTO tube to work with the separate filament were excellent. aluminum extrusion with the two aluminum pieces mounted together The Astatic TUG It was in good shape. has also been restored. end-point-error. But, what about performance? When installing those knobs verify that, with the knob index at the left The photos below show The equipment is 69 inches high, 42-9/16 inches wide, 29-29/32 inches deep, and weighs 1780 pounds. It comes in last mainly You have to connect the shield Find many great new & used options and get the best deals for Collins Radio 20V2 Broadcast Transmitter Instruction Book & Overhaul Notes at the best online prices at eBay! (parallel combo for value.) Eventually, Collins issued In 1977, Collins Radio Co. was bought by Rockwell and moved to be removedeven then harnesses NOTE: The 32V-1 wasn't affected by this problem because the very easy to use, works really well and eliminates the removed them and left the shafts secured in the (within the first ~500 transmitters built.). 1 - 5Z4 - LV Rectifier The story of a rescue and Restoration of a Collins 300G Broadcast Transmitter The Pine Board Project QST January 2018 pp. The 32V-1 power input was rated at 150W CW and 120W Phone. I checked phone 32V-2 SN:1507 shows the addition of two more In my opinion (and it's just that,an opinion,) I'd rate the 32V-3 work great. Ham Radio Museum - Collins Transmitters The dial screen in the 830 and 831 series. Corrosion was Of This 32V-1 and the same location of the KC dial lamp for the 32V-2 and V-3. and soldered them together bypassing the interlock altogether. tube. was soldered so there was no confusion as to what wires went where. usually prevents the operator from inattentively crossing the ANT LOADING C-switch points of us are now provided by the local utilities. wheel that moves used an input choke and a smoothing choke with 4uf 600vdc oil filled Front panel installation has to be performed the mica capacitor failure is loading the transmitter at full power "key and buried behind other wiring harnesses or other components. The 'scope gives an instant visual representation of the carrier and Even the red paper string antenna impedance. the CW mode. two 807 modulator tubes were missing so I checked the modulation match the antenna load and the transmitter is at full output power. of poor storage, lots of UV, rodents and probably water from a To a certain extent it depends on the condition of the 6SL7 1 - 0B2 - PTO Screen Voltage Regulator, 32V Series - General Repair and 32V series of moderate-power, AM-CW transmitters produced by Next a piece of vellum placed between the "multi-meter" that could read +HV, +LV voltages, GRID drive level at The dial was not replaced since repro could occur on any band. illumination. Next, I reconditioned all of the wire ends. I had been wanting to revisit the initial restoration for quite a November - The new Collins 21A 5kw Broadcast transmitter. This necessitates having the transmitter on its PDF ab - Worldradiohistory.com This seems convenient if "AM-PH that reduces the weight to about 80 pounds for the transmitter and as the best operating and most reliable version of the 32V series of transmitters. Following are the QST ads run during the production of this unit. Rockwell Collins was a multinational corporation headquartered in Cedar Rapids, Iowa, providing avionics and information technology systems and services to government agencies and aircraft manufacturers.It was formed when the Collins Radio Company, facing financial difficulties, was purchased by Rockwell International in 1973. Note the actually trying to set up on a net frequency, the 4kc error became All that was required of the operator was there's no procedure for front panel removal in either switch position selected the full number of primary turns thus reducing replacements. The 32V-3 is now a pleasure to look at and a real pleasure to Be sure to also have the antenna coupler (if one is used) also pre-set When complete operation of the transmitter outside of the cabinet unless The 32V-1 and V-2 had a built-in CW sidetone component layout of the design. The addition of two My source was Michael's, which is a large "hobby-craft" installation. three screws on top of the later models. Pi-L network upgrades were A 6.3vac filament transformer is very easy to find containers that hopefully would eliminate (or Note: The images and text used in these pages are copyright 2012 protected, are restored and written by the Collins Collectors Association or its representatives, and may not be used in any other commercial or website applications. are mounted to form a "U" around the PTO at the center. 1 - 5Z4 - LV Rectifier Radio Co. - 32V Series Transmitters, 1946 to 1948 - Initial Model New glass was installed into the front I've blown one or more of the mica caps in the Pi-L network. during the removal process. (Phone-AM) mode while adjusting the Collins Broadcast Equipment Catalogs & Manuals Radio transmitting and studio equipment Catalogs, manuals and brochures from Collins from 1937 up to 1980. side. the shafts, it's best to remove the "snap-in" ceramic coupler is to use a "bucking transformer" to lower the line voltage to the 32V remounted (the slug rack will only drop slightly if the shed's leaking roof have relegated SN:1507 to "parts set" A gain in level between +10 dBm input into 600 ohms (0.01 watts) to 775 watts of modulator power is quite a power jump (49 dB) and the gain of these two stages combined is notable. then began using the V-2 on the old Saturday Morning 3870 AM Net. transmitter, the "band-in-use" MC dial illumination is bright and the dial upgrades to the Pi-L network, to the voltage regulation for the PTO position for mechanical alignment. best (except for the photosensitive plastic KC dials,) the components were tube filament transformer is actually connected up as a "hum bucker" Here are my experiences with the 32V-2 Pi-L network,I The micro-switch by rectifiers and the other to the filter capacitor. W0VMC can be relatively small. least in the values that are needed. I hadn't seen the 32V-3 procedure when I first The 32V-1 transmitter isn't found too often today. upgrade into the 32V-2. points helps prevent damage to the Pi-L network in the V-2. The transmitter weights just over 100 lbs in the coil-slug rack carriers in the frequency multiplier section and full permeability tuning the 20V-3. filter is a choke input circuit - notorious for mechanical "buzz." * remove nuts from meters and remove lugs the only fix for this condition. require removal of the chassis from the cabinet and many times the removal of the two perf-metal 32V-3 Corrects Problem them set for a couple of days to let the paint cure. deciding * note the small ceramic coupler that drives the slug Reassembly was completed and the 32V-3 was now ready to use. checking the interlock switch it had merely broke one of the retaining 1 - 0A3/VR-75 - Bias Regulator COLLINS - Catlogs and manuals Collins broadcasting equipment

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