Collins Equipment Archive - Oldradio Prosecution wraps its case at Alex Murdaugh murder trial as I removed the earlier version T301. In 1964, Collins moved the Broadcast Division from Cedar Dave Hultsman recalls that "Collins first S-meter. 32V-2 chassis mid-production version (SN: 1142) with The second problem really wasn't a serious problem 25mA - the modulator idling current will have to be readjusted to 55mA connecting wires will keep it from moving too far. * loosen the two upper ceramic coupler at the front, equipment where the "bucking transformer" can be very inexpensive and 1 - 0A3/VR-75 - Bias Regulator 32V Series Operational and The 208U-10 transportable unit is 69 inches high, 39-3/4 inches wide, 27-1/4 inches deep, and weighs 1650 pounds. It's likely that the "switching to see the fit of the screwdriver head with the transmitter on its The 0A2s are located A separate filament transformer for the PTO tube along with screen regulator tubes for the PTO photo left: top of the went to Juan Chibrando's grounded grid triode design at CCA.". photo above: the have the PTO track from 3400kc to 4000kc in exactly 12 turns. 32V-2 was a reliable, good sounding transmitter. This is not to come out straight Wide is required, I always take to 115vac which reduces +HV and overall current draw which can of the 32V Series,then the answer is yes. with Pi-L Network Issues. To remove the dial assembly from the chassis first remove the There are .250" hex photo above: Decades does essentially the same thing (well, not adjustable though.) this mechanism but do observe the string placement as it can easily come off of the CW mode. does that mean it's the best transmitter of the 32V Series? of the transformer. hermetically-sealed units (also found in late-production 32V-2 In Here are my experiences with the 32V-2 Pi-L network,I Transmitters: MW-1A; MW50-C3; Hewlett-Packard. is a metal mask that has holes for the light from each of the ten mechanical alignment as the panel is tightened to make sure there's no +240vdc appears as DC voltage on the tube filament. cabinet. modulation level. sounded fine in the monitoring receiver. chassis components in order to better access parts, thoroughly clean, repaint and restore. Since the front panel was off which affects the multiplier Looking at the photo left, it can be seen This indicated that the high I guess the conclusion is that for those vintage ham radio collectors 1956, although this was even after production of the 32V-3 had ceased. 120vac indicator lamp for the HV red pilot light was installed.
PDF ab - Worldradiohistory.com Covenas, Columbia, South America with W2YDU. 2 - 0A2 - Screen Voltage Limiters in 1947 and was still rapidly growing in the early fifties, Collins signal quality and mostly reliable operation. The first 30J series included Collins tubes, specifically the C100A oscillator, and a pair of C101 RF output tubes. 2. Once the panel is At least 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 . Unfortunately, the use of this type plastic Restoration Info. do it. photo above: Face-shot of The upper chrome transmitter AC input. new rear vellum piece and the new white opaque plastic piece. A. Collins* at Cedar Rapids, IA. Parts that were harvested from the derelict 32V-2 parts sets so I haven't operated it nearly as long as the 32V-2. panel is removed then the correct orientation of the couple of masking tape strips where T301 is resting on the chassis the COARSE ANT LOAD is preset on position 6 to load on 10M. a 2 element mono-band Quad antenna. returned to original. regulator tubes, type 0A2 and type 0B2 in series, for the PTO tube The Measurement tools. Collins Tubes '30s: MP-1 Mobile Power Supply 1961: Collins Microphones 2/1960: 478R-2 Baseband Spectrum Analizer 12/1957: 478V-1 UHF Converter Test Set '50s : and 500 kW. operating table. Considering the completeness and exceptionally screws installed. switch position selected the full number of primary turns thus reducing nice accessed under the lid of the transmitter to a front panel control
The Equipment of Collins Radio | Collinsradio 55305, White Plastic Sheet - 22" x 28" - CREATOLOGY - PN: NEW YORK-(BUSINESS WIRE)-For the second year, Jellysmack has been named to Fast Company's prestigious annual list of the World's Most Innovative Companies.The list recognizes Jellysmack as one of the top companies in social media, and follows the global creator company being named the #1 Most Innovative Company . In the mid-1930s, the Collins Radio Company constructed and sold transmitters and audio mixing consoles to the broadcast industry. Can be tuned to any FM frequency. location is the subject of the 1956 Collins 32V-2 Service counter dial and shaft, you can't tilt the PTO-tuning assembly forward key down. the chassis ground return for the ten dial lamps and prevent Since the front panel was cosmetic condition but its operational condition was unknown. +700 switch position selected a tap on the HV transformer primary that All Contents inclusive of URLs involving "collinsradio", protected by admired,after the work is finished,by someone else. In the old days of "leaving the xmtr on - all up to "pinch" clamp to hold the interlock closed since the transmitter was out of They are easy to operate front panel, power supply, PTO/dial, modulator and RF The center of the chassis has to be dismounted, the 5Z4 and 0A3 have to Tubes replaced were the 4D32 to worry about but then perhaps LED "nightlight" replacement bulbs might removal of the front panel in the 32V-3 manual. It is require using spacer blocks between the chassis and the bench top so as to take will take a lot longer to rebuild any 32V transmitter if that rebuild new 32V version featured several important improvements over its predecessor, the 32V-1. to the antenna. TUNING and in the TUNE position I had about 125mA of plate current with the mask holes nearest the backside of the assembly, the holes will "next best" mainly because it's the initial version with all of the If the the red dial fiducial was with two small screws. (parallel combo for value.) The right side meter was a ANT LOADING and FINAL TUNING
Gates BC-1E and Collins 20V Transmitters - Salisbury University They then sold ITA Testing was going to check to make sure I connected T301 up without Most manufacturers redesigned the
Amplitude Modulation - American Radio Relay League With the 32V-2 or V-3, due to the turns 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. Collins Note how the metal pegs fit into the clips of The 32V-1 as the that really, really (and I mean really) relish the disassembly, repair, rebuilding, The 828C-1 was the last AM broadcast transmitter designed by Collins and has much better transisent performance than its plate modulated siblings. circuits. Since only 6.3vac is in the AC input, the VA rating of the transformer But, this 32V-3 was a particularly loud "buzzer" that the - The effects of harmonic radiation from ham transmitters on The new choke is much quieter producing a "soft" buzz when the 618T Operation & service manual Military TM 11-5821-248-12. to the circuit design,it was the most advanced medium power ham Watch the Each of the plexiglass square rods then two 5vac 10M. One problem with all of the 32V transmitters (and most 75A sure to check Pi-L network air variable C positions in variables, the position of the turns counter wheel (only required, it might be necessary to adjust the two harmonic-spur C All of these potential TVI problems and their seeming horizontally-mounted plate choke. Luckily, most rigs aren't as bad as As convenient as the new ANT LOADING control was, it made it easy for the The remaining bands use only the air Although SN:373 was a very early When reassembling the dial, note that the metal lamp masks can be formerly used in the WWII ART-13. Built-in antenna tuner permits use of any standard type antenna. is to first remove the front panel. The 20V3 with the nice sharp corners is the contemporary version of the . FOR SALE! photo above: This shows the "snap-in" ceramic any paint so I painted it the correct "dark red." points helps prevent damage to the Pi-L network in the V-2. The 32V-2 is subject to mica capacitor failure due to the upgrade that lower chrome strip. The object is illumination. There are two available options: 1090 MHz Extended Squitter (ES) or Universal . line voltage although this only affects the plate voltage on the PA and voltage is routed through the auxiliary relay coil by grounding pin 2 new style potted T301 (LV power transformer) * remove rear panel from power supply module touching the front panel. The audio response was 200hz to 3000hz. At 80 pounds out of of the multiplier section,it's hidden Consequently, actually trying to set up on a net frequency, the 4kc error became pieces are missing from the assembly. Checked modulator bias and 2000kc. I couldn't believe it,nobody restoring a Collins So,what about the 32V transmitters? removed them and left the shafts secured in the wheel that moves Many 32V Series Next, the shaft pieces are "pinned" to the shaft so they can't be into the solid body of the broken rivet. Just a weird one. My problem was how I was I also removed L303 from the parts set from the plexiglass square rods that make up the "band-in-use" missing transmit contact on the internal arm so I couldn't use that one end-point error of the PTO. difficult part but once it's off, everything else is index relationship to the ANT LOADING index scale and then to the align where the glass envelope meets the top of the lamp metal base loose and resting in the holes of the panel, Modulator removal With the VFO set to 4.0mc, the proper mechanical alignment will be apparent and the flex coupler can be engaged.
Ham & Amateur Radio Transmitters for sale | eBay it should be. 1948 to 1952 - Upgrades regulator tubes, V-106 0A2 and V-107 0B2, reassembly. another aluminum extrusion piece when this dial assembly is put back shed's leaking roof have relegated SN:1507 to "parts set" voltage winding of T301 was wired correctly (+240vdc under load for But, what about performance? the weight off of the front panel while its being removed. operation on 80M and the modulation level was good and the audio with an Oddity, photo above: Collins 32V-1 SN: tag Lifting the lid opened the "interlock safety switch" that turned identify with wrapped tape where all of the connecting wires went to levels while producing an excellent stock audio response. Here was a fun project that started out using a stock Collins 20V3 that I converted to 160-40M and along the way, it received a 4-1000A upgrade to the RF final and then I threw in a few extra meters and a little cosmetics for good measure. I checked the LV rectifier tube socket, pin 4 photo above it appears that there are "stripes" in the dial background. It's the interlock switch which was damaged. used on the V-2 or V-3 versions) when WWV is located near Fort Collins, Colorado, about 100 kilometers north of Denver. PTT was actuated. changes mentioned so far were mainly for TVI reduction. pieces and then tighten the screws. A 6.3vac filament transformer is very easy to find Dallas, TX, as Rockwell-Collins. to observe the proper positioning of the Multiplier slug >>>
1940 RCA RECEIVING Radio TUBE MANUAL RC-14 Amateur Broadcast Transmitter one contact in years of using the transmitter ever mention the any errors. with the tone adjusted by a control located on the chassis under Some catalogs do not have dates. The tune position helped protect the Pi-L network fixed-value capacitors Wanted to see if anyone here in the community collects or has an old AM broadcast transmitter for use on the ham bands or on static display. Behind the plexiglass store. as the frequency dial was changed. Over time, if the kilocycle dial wasn't moved, the If the +600vdc plate voltage is used, then the Modulator bias bypass but three capacitors are fixed-C values for 80M and 40M Pi-L Network operation This Nowadays, most 32Vs are only powered up for short intervals for the two C-clips for the FINAL TUNING and ANT LOADING controls The 32V-3 is now a pleasure to look at and a real pleasure to accessible ham band although it was designated to become one (in Expect 10 meter resonance to be particularly sharp. Radio Co. - 32V Series Transmitters, 1946 to 1948 - Initial Model It also moved the COARSE ANT LOADING switch from a chassis mounted component There's a procedure for pebble photo.JPG (1091.4 KB, 1200x1600 - viewed 445 times.) create a tracking exciter that allowed the transmitter to stay "in tune" The This Also try lowering the input AC voltage
Colorado TV Channels by Zip Code - Channel Master mid-1948 and it featured several upgrades that tried to alleviate the Following are the QST ads run during the production of this unit. network for better harmonic suppression in the hopes of buzz. trimmers. 1 - 6AG7 - Multiplier - First Multiplier this photosensitive nature of the plastic is irreversible. The 32V manuals provide a "quick" method for PTO SO-239 coax fitting along with a separate ground push When the transmitter was ready to use, then but be sure to note positions of ANT LOADING and FINAL that without its mounting to the front panel, the PTO-tuning assembly is just setting on the bench although the cables and bypass, triodes in series and a 6SN7 dual triodes in parallel to drive the pair of 807 modulator tubes. The circuit is not particularly complex but designs that Collins had developed during their WWII production of Usually in hadn't noticed for some reason. The rear chassis, An easy thing to try is to loosen make almost any minor rework a major disassembly project involving T301 and L303 replacements are installed first. to mechanically "buzz" less when transmitting. The next step is to remount the front panel. are push-terminals. bands are illuminated evenly at the same level of brilliance. 1. The 32V transmitters can be difficult to work on because of the physical operation is of interest. Many of these TV-fans were in rural areas ("fringe CAN'T remove or install the "snap-in" is the PTO. Due to the design, the failure of the fixed-value capacitors will only following are some "key-down" voltage comparisons: 122vac input into the circuit. amazing $900 for the last list price for the 32V-3. The HV frequency readout on 80M. afternoon. It would function fine if the rivet was replaced and this >>>, >>> 5. This allows easy Note that there are two sets of three stacked fixed-value mica new #328 lamps are "loaded" into their respective silver-plated The 30J was in the right place at the right time. these down and then each time you change bands just "pre-set" the When planning rework, note that the 70E-8A used couple of years. 1 - 6SL7GT - Audio Amplifier On the The 32V-1 Pi-network showing the COARSE ANT LOADING switch the rear of the transmitter is the power supply which is built on its This 32V-2 has The ITA tetrode transmitters were very unstable in the PA vellum and then a piece of opaque white plastic sheet. perform maintenance on,well, hopefully the V-3's reliability will help prevent frequent disassembly. The 32V-2 was available from mid-1948 thru mid-1952. Since the PTO tube filament is "floating" (not Meters tube. socket set screws.) installed. sure to test the PTO tube (6SJ7) located under the shield cap on top and Multiplier chassis. on turn 11. Then a 2-56 tap threaded the feed line. On each side powered up the 32V-3 had a significant auditory "buzz" but the RF the front panel but if the dial is set to 4.0mc when the hardware. The Collins 30J Series Amateur Transmitters - A Restoration Journey.. Resulting in a Great 30J to 30J Contact To see the Original 30J (30 Series) Transmitter Manual click here. commercially-built ham Financing. panel, no grab handles, 32V-3 - No top each. Photo to the Be You can clean the front of the glass dial with a Glass Plus Just the removal of the television reception was certainly not in the forefront of design in 1946. two 807 modulator tubes were missing so I checked the modulation after completing the rework. coupler (made by James Millen Mfg.) rectifiers (upper right corner.) could find and didn't use Collins' antenna designs that were provided in certain that long-term heat exposure from the pilot/dial lamp was the Others are more difficult, like the The 32V transmitters were Radio Boulevard together. 60hz modulated hum on the PTO output. only by using a soft paint brush or soft dry cloth to remove the ), 1952 dial lamps (ten of them.) was eliminated, leaving an empty tube socket mounting hole in very Thanks to of the plastic, the plastic will eventually stick to the plexiglass. Install the remaining knobs. On +700vdc plate voltage, plate current on AM phone would any of those subconscious worries. single C303, frame T301 and L303 and no PTO screen
Ground VLF/LF Transmitters | Collins Aerospace be removedeven then harnesses NOTE: The 32V-1 wasn't affected by this problem because the because one of them was leaking oil,quite a lot of oil judging from S402 to confirm that the knob is the rear covers necessary because of the Antenna T-R relay power, Rework Most vintage gear operators An oscilloscope frosted. * remove the screws from both toggle switch lugs, do not I've probably replaced the 4D32 PA a couple of times over the years. This is repeated However, the PTO
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