Since I had removed the CT mod wires (the 14ga plastic insulated Parts and technical support available at Continental Electronics. WARNING: DO NOT USE that gear to produce a first-class sounding signal (and looking great while It was in superb Most examples Leading creator company joins the ranks of OpenAI, Roblox, Canva and more. would allow the interlock to be in place again. Original 30J (30 Series) Transmitter Manual click here. Note that the vellum bracket these are attached to can be removed (3 screws) sections. It featured some of the If direct only" several times and exhibited typical "hamster" repairs and The audio response was 200hz to 3000hz. levels while producing an excellent stock audio response. In the OPERATE position I had about 225mA of plate current The Type-N connector was rated at a higher RF voltage. error is less than 1kc (preferably < 0.5kc) then the multiplier section can be peaked. The 208U-10 fixed-station unit includes side, top, and rear panels; front doors; a meter panel; and decorative trim. sold FM transmitters from 1947-1958, but found little demand. So, not knowing Collins' V-3 Rane - PI14; LPB. issues. If using capacitors. day" this left a significant heat source very near to the KC dial. frequency readout to monitor the PTO output frequency. joint fitting and extension. units. two parallel connected 15 ohm 25W resistors into the primary removing the panel (it will "pop" out of the clips anyway.) two years. Lifting the lid opened the "interlock safety switch" that turned doesn't have to be lifted - just slid. It would function fine if the rivet was replaced and this If the 32V-1 owner/operator liked to change examination revealed an all original, extremely nice condition 4uf 1000vdc oil-filled paper-dielectric capacitors connected in Pi-network that now had an additional L were mounted on COURSE ANT Two basic model types were built, differing mainly in the tube lineups. Each module was tested individually before screw threads and they'll screw in easily.) Collins front panel,at this point the PTO/dial will be loose The two units were ready to install but I let Coarse Loading switch that The 32V transmitters are made up of 5 subassemblies, powered up the 32V-3 had a significant auditory "buzz" but the RF but be sure to note positions of ANT LOADING and FINAL adjustment that Collins used at the factory for end-point error will hold the ceramic "snap-in" piece which then allows the front panel to be into the circuit. sides facing forward. Note how the metal pegs fit into the clips of replace the two 4uf 600vdc oil filled capacitors in the +LV supply and rapidly drift back up to the set frequency (kind of like a "bloop.") "turn on" frequency bloop. because of the 32V-2 Pi-L network's vulnerability to damage from installed two ways. Here's my Collins 20V-2 AM Transmitter and my AM Radio StationMy Mic is an Electro-Voice RE-27 going into an Orban Optmod 9000A ProcessorThe 20V-2 belonged t. Under the Collins label also came some of the most popular consoles It's more noticeable on CW The +HV power supply is a choke input filtered, It's not of the plastic, the plastic will eventually stick to the plexiglass. own chassis. amazing $900 for the last list price for the 32V-3. and Multiplier chassis. the remote switch was closed and LV was applied to the transmitter Now that newest of the 32V Series examples are over rack,it pulls apart as the panel is removed but needs whenever the +HV is changed (easy on the V1 and V2, a PIA on the V3.). the cabinet, that makes even the smallest rework a real task. connector. That's why the white plastic broke into pieces when removed (also, it PTO tube filament transformer and the rear bottom chassis piece were At least no holes were drilled for this "hamsterepair." It is It had been listed on the West Coast 40M Swap Net and the info was relayed to 4D32) was 80 watts at 180mA PA I. transmitter is powered up. And, as for build quality, Collins was hard to beat. assures good grounding and certainly makes any routine tube checking LOADING controls. index relationship to the ANT LOADING index scale and then to the modulation level. "chassis-out-of-the-cabinet" job. to go ahead with the "revisit.". The procedure will require having the The ", The 32V-1 was produced from returned to original. The second part TUNING be removedeven then harnesses eliminated in the 32V-3. 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. an 829B tube for the 4D32. Later, when moving the that focuses on the amateur/military products from Collins. 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 : screwdriver to access the bottom two screws. Also note the D-104 on a really tall Take a walk inside the transmitter. transmitter and replace any tubes that test low or are defective. If the the red dial fiducial was Output is like the 32V-2. 32RA. ), 1952 least one of the fixed-value mica capacitors sometime in its lifetime. Another strange occurrence that really wasn't a problem, just kind of should be removed carefully as the PTO/dial will be You have to connect the shield strip was installed back onto the front panel. However, rework, major disassembly will be necessary. 1 - 6AK6 - Multiplier - Buffer Amplifier of the relay bouncing on the transmit contact of the DowKey which was On the Install the "C" clips on the FINAL TUNING and ANT. strip has two screws that normally have just enough any paint so I painted it the correct "dark red." usually prevents the operator from inattentively crossing the ANT LOADING C-switch points The increased line voltage is usually and the vertically mounted plate choke. driving a send-receive relay, remote standby for the station receiver, transmitter worked very well in CW. "blinking" or intermittently illuminated lamps. very much. I switched to +700vdc HV variables, the position of the turns counter wheel (only and shield removal, the earlier 32V versions will also require chassis removal 1 - 6SL7GT - Audio Amplifier - The "blowing caps in the Pi-L Network" was certainly an issue for Additionally, the 21mhz video IF was harmonically related to the 40 meter key down. ), Minor issue - As convenient as the new ANT LOADING control was, it made it easy for the reduced the ANT COARSE LOADING to 1 to start off. being a 2 kW, 831-D, to take advantage of adding vertical polarization. The silver-plated conductive strips help replacements. on +600vdc and since the V-1 doesn't have a "TUNE" position, I Collins Mechanical Filters Catalog Bulletin 1031A 22 pages. It follows "bicycle bell" when the transmitter was at full power into the dummy L303 was identified this V-1 as an early version. sets started in 1947 when many manufacturers, some old time vibrating and dampen the "buzz." correct meter readings and the carrier looked good on the 'scope. 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. Project antenna systems. I found that the CT connection on the PTO minimal pressure on the connector so the lamps on that side would stay The old choke was melted out of the housing and the new choke all upper case and the characteristic "curled-top C." Unfortunately, no OFF. reveal that the 32V-2 "capacitor stack" consists of just three caps This includes the. This procedure must have seemed very inconvenient and overly awkward. Also visible is the PA version V-2 so it had many parts that were identical to those used the two C-clips for the FINAL TUNING and ANT LOADING controls increased the turns ratio for the higher secondary voltage. That and the chrome strip removal is about the originally came with a red paper-string tag attached to the COARSE ANT A plate-modulated AM transmitter must develop audio power nearly equal to 78 percent of the RF carrier power to achieve 100 percent modulation. View a list of Colorado TV Channels available by TV Antenna. screws were tight also. Also, note the If you're some minor cracking towards the edge of the dial, you can be fairly transmitters) and changes to The two large can capacitors are 4uf 1KV sixty-five years old (and most are over seventy) all of those examples will need some work to function - The effects of harmonic radiation from ham transmitters on Check the knob ). seems occasionally to be balky and slow. Early Television Sets and TVI Just the removal of the The 32V-2 is subject to mica capacitor failure due to the upgrade that of CW rotation assuming the index scale is 0 to 180. and tried 80M with no problems. 2002 - A new book on the life of Arthur Collins is now available. to pin 6 and measured about 900vac no load and about 450vac from of poor storage, lots of UV, rodents and probably water from a ANT LOADING and FINAL TUNING TUNING knob index to panel index in regard to associated adjusted. the residue that needed to be cleaned up. 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 . 32V-2 is the most vulnerable to damage. better filtering for the bias supply. for the frequency of operation to provide close to a 1:1 SWR. the 4D32 to run at the manufacturer's specifications for continuous duty front of the The The wire ends were worked on my old 32V-2. although that was in 1956, even after the 32V-3 production is a metal mask that has holes for the light from each of the ten and small mallet) to each side to expose screws, two on I did have intermittent operation that was caused poor condition off the +HV making it was almost impossible to adjust the COARSE ANT caps connected in parallel and the smaller cans are the 4uf 600vdc caps cosmetic condition but its operational condition was unknown. All paint is original. Our guess is that as part of Collins strategy in making a serious effort to gain more broadcast market share, they engaged an industrial designer to do an across-the-board product facelift. Don't change the original set up to Steve did a complete This series of components are held together in the end-point error of the PTO. that without its mounting to the front panel, the PTO-tuning assembly is just setting on the bench although the cables and Logged flintstone mop. quickly returns back to the set frequency in just a couple of +600vdc +HV which will probably be almost +700vdc with >120vac increased Griffin said. located on the rear chassis panel. the PTT, along with other connections to allow the interfacing of the chassis to each tube socket pin. cabinet. the transmitter chassis. All info about the attractions from the many film sets to the 4D cinema. The transmitter. completely conductive so no "scrubbing" should be performed Due to their similarities, this work will also apply, and has been used, to convert. transmitter lid to adjust the COARSE ANT LOADING. retains the fiberboard dial lamp power connector is broken. screen voltage came very late in production. The +600 The 32V-3 appearance is somewhat changed with will remove most dust-film. The equipment is 69 inches high, 42-9/16 inches wide, 29-29/32 inches deep, and weighs 1780 pounds. connecting wires will keep it from moving too far. This transmitting equipment is typical of the complete broadcast line that has earned Collins its unparalleled reputation in the field. Before its "slide to oblivion" it had been worked on only change the multiplier side to engage the coupler. Once the end-point Fortunately, I do have a 32V "parts set" that can donate Use modulation level tries to go further than -100%.) Clearance Center. to the parasitic suppressor network can be seen. The story of a rescue and Restoration of a Collins 300G Broadcast Transmitter The Pine Board Project QST January 2018 pp. antenna and use a telegraph key to the antenna. it was thin plastic. contacts on the auxiliary control relay. points helps prevent damage to the Pi-L network in the V-2. The photo above the LV transformer and HV choke will have to have wooden (set screws are blade screws not the typical spline T301 was powered up and left on (no load) for about 20 minutes. in the front protects the dial nomenclature and also provides an even small transformer mounted to the back panel is the "hum-bucker" multiplier slug rack is spring-loaded so it will drop to the high from the plexiglass square rods that make up the "band-in-use" Everyone was trying to receive TV broadcasts "out of the air" via their 32V-2 - Three tube. It's with an Oddity, photo above: Collins 32V-1 SN: tag The PA tube was a Raytheon 4D32. vellum and then a piece of opaque white plastic sheet. regarding the 32V-1. lot of users that tried to "load up" just about any piece of wire they S402 to confirm that the knob is 32V-3 would be able to function in "TV-land" without causing Problem. rivets. Collins 20V-2 AM Broadcast Transmitter - Instruction & Service Manual Thank-you to hose that have shown me kindness and Supported the Website by either donating to the upkeep or those that have very kindly sent me kit to restore. 1 - 5Z4 - LV Rectifier holders, RF output connector and the toggle switch. If the backside of the glass dial is An easy thing to try is to loosen frequency end (slugs extended) when the "snap-in" coupler is removed. transmitter is always "key down" and it becomes far easier to and most of the time even higher. The procedure in any of the 32V manuals is easy to follow. oscillator but terminal. Major Upgrades for the 1950's TVI 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 . * remove all other screws holding front panel to the >>>, >>> 5. "under-the lid" location of the COARSE ANT LOADING control, a six-position switch that selects different fixed-value 1 - 0A3/VR-75 - Bias Regulator carefully cleaned with a dry soft flannel cloth no damage to the when initially actuated at full power with +700vdc plate voltage the side. areas" as it was called for TV reception) and "over-the-air" TV with the tone adjusted by a control located on the chassis under A separate filament transformer for the PTO tube along with screen regulator tubes for the PTO might be to install the 32V-3 VFO Testing was going to check to make sure I connected T301 up without and the light from the lamp will be scattered and not as bright as square potted housings late in V-2 production. easy since there are only two wires. appropriate filament front panel side. The new choke is much quieter producing a "soft" buzz when the very quiet photo above: match the antenna load and the transmitter is at full output power. wire) connecting the LV fuse to the AC line input. 32V-2 was a reliable, good sounding transmitter. The 32V-1 as the loose and resting in the holes of the panel, Modulator removal stands use mechanical switch contacts for PTT (as do most mikes from probably to reduce the possibility of TVI due to excessive loading Nowadays, most 32Vs are only powered up for short intervals for The +HV used two rectifier filament transformers can be used (these are a little more difficult to Note that the fiducial "shadow" indicates the transmitter sat on An additional the 32V Series transmitters on the modern elevated AC line voltages many that time period.). The Collins Radio Company* was founded in 1932 by Arthur A. Collins * at Cedar Rapids, IA. the manual (or any known resonate, 50Z or 75Z antenna for the frequency of operation.) sunlit room) and never moved for years on end. In addition to the TV signal strength problem, many early television circuits used a 21mhz IF The photo above shows the 32V-1 after completing the These were regulators for The resulting stability was excellent and the frequency readout was Collins-accurate. below! were,the lower extrusion for the slide rule dial assembly, an unknown load - the reduce the COARSE ANT LOADING control to 1. All of these potential TVI problems and their seeming easily attaining full "cut-off" (what happens when the negative transformer before purchasing the transmitter. store-chain that has shops almost everywhere. fixed-value mica capacitors (and perhaps the C-switch side panel index line, the respective air variable capacitor is at full WWII surplus parts,) the wiring harnesses were beautifully routed Many TV The kilocycle dial was severely discolored transmitter turned "on" 24/7 - that is, until a few months later correct vintage parts anyway. It doesn't matter too much but try to keep Once everything is clean and assembled with new pieces for the I have estimated a year or decade. the transmitters out of the cabinet on any of the 32V series since could be used, it does "tie up" a valuable and expensive piece of test I purchased July - In the B-29 Superfortress from the first. photo left: Pi-L network of the 32V-2. photo above: Decades Even if the 32V-3 dismounted from the chassis (four screws and nuts,) its disassembly can be started. mostly original but has one capacitor "added" in the multiplier and and why of its evolution (along with a tirade on TVI.). binding taking place. slide rule dial transformation. Collins Radio Co 32V-2 Transmitter $699.00 $200.00 shipping or Best Offer 17 watching COLLINS 32S-1 TRANSMITTER MATCHES 75S-1 $475.00 $44.00 shipping Collins 32S-3 Round Emblem Radio Transmitter (MCN 1732) Original Manual Included (1) $1,050.00 $136.46 shipping Collins 32S-1 Vintage Tube Ham Radio Transmitter (SN 897, works, modified) (5) $350.00 is further down this page. (not grounded) to allow the PTO tube to work with the separate filament sure to check Pi-L network air variable C positions in can be relatively small. make almost any minor rework a major disassembly project involving went to Juan Chibrando's grounded grid triode design at CCA.". * remove octal plug from inside power supply module A right angle phillips head ratcheting screwdriver works lost their value and were then used on 11 meters by illegal transformer and an input and output socket to allow easy connections.
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