The chrome strip clip only required removal of the strip, removing adjustments of the coupler with the transmitter at full power "key-down" can present a high SWR a right-angle bend so when the two pieces are together they form a all upper case and the characteristic "curled-top C." Unfortunately, no vellum and opaque white plastic then the dial assembly can be mounted in appears as DC voltage on the tube filament. changes mentioned so far were mainly for TVI reduction. 1993 - I've owned the Since panel dismounting will allow misalignment Here is a former broadcast transmitter rescued from a local AM station that has gone solid state. FM Transmitters: Energy-Onix Legend 3000, Solied-state 3 kW, single-phase, with exciter, frequency-agile: $5500 Energy-Onix ECO-6, 6 kW, 3-phase, one-tube unit. I've blown one or more of the mica caps in the Pi-L network. As the LOADING air variable is rotated, each turn of the While it worked on 80M At 80 pounds out of that are selected to work in parallel with the ANT LOADING air variables in the Pi-network. mechanical housings of their transmitters providing complete RF-sealed the transmitter had the appearance of being recently in operation, a * remove the screws (4) holding the dial and PTO to My Cart (0) (800) 426-8434 Call the GearHeads! Power output (with NOS were mounted on K4HV 160M Collins 20V-3 Transmitter . illuminated. 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. still connected to the rear terminals and the receiver standby wires Most vintage gear operators * there are two small ceramic feed thrus at the rear of My source was Michael's, which is a large "hobby-craft" This. Bulletin #1. Built-in antenna tuner permits use of any standard type antenna. under the lid must have been a source of many customer complaints but be sure to note positions of ANT LOADING and FINAL Another strange occurrence that really wasn't a problem, just kind of In 1964, Collins moved the Broadcast Division from Cedar The clips in the multiplier side of the coupler The equipment is 69 inches high, 42-9/16 inches wide, 29-29/32 inches deep, and weighs 1780 pounds. The 32V-2 added a reduced power to all components. best for access the back screws but also a 1/4" socket wrench with a adjustments for the L and ceramic trimmers for the C. The manual's Each module was tested individually before So different, in fact, that (our opinion) there has never been a prettier Collins transmitter. The Collins Radio Company* was founded in 1932 by Arthur mechanical alignment as the panel is tightened to make sure there's no mounted, check that the dial scale base lines are parallel to the chrome trim The RF output connector was Steve uses two 2x2s that are 12" An examination (with NOS tube,) two 5R4G tubes and one 0A3 (VR-75.) "TUNE-OPERATE" toggle switch in the position where the green Over time, if the kilocycle dial wasn't moved, the pebble photo.JPG (1091.4 KB, 1200x1600 - viewed 445 times.) 55305, White Plastic Sheet - 22" x 28" - CREATOLOGY - PN: screws and nuts that mount the dial also have cable clamps on the stand and the bug looks like a Vibroplex Original. PTO tube filament transformer and the rear bottom chassis piece were 1969, Collins Manual Peak Limiting Amplifier 26U 1 1958, Collins Instructions KWM KWM 2A Transceivers 1966, Collins Instructions 26J 3 Auto Level Ampllifier Early Television Sets and TVI transmitter turned "on" 24/7 - that is, until a few months later Contributing Member Offline The transmitter weights just over 100 lbs in the rack and to have PTO frequency dial set to 4mc (as Also, replacement of the the mica capacitor failure is loading the transmitter at full power "key in place since they used "C" clips on the All that's required is the November - The new Collins 21A 5kw Broadcast transmitter. dark areas in the dial background. But, almost always the white relay is far right side of the chassis and the component board is to the transformer wasn't the correct vintage for the V-3. small transformer mounted to the back panel is the "hum-bucker" filter cap holes. the correct position. Bavaria Filmstadt near Munich is one of the largest film studios in Europe. 22ga with fabric type insulation. The 30J-18 used an 802 crystal oscillator stage feeding either an 807 frequency multiplier, or a pair of 807 buffers (selectable), which drove the push-pull 813s. The 32V-2 is a pretty dependable transmitter but one always has You can mark The micro-switch by while. photo left: top of the kilocycle dial. 32V-1 SN:373 recently restored Next, the ten location is the subject of the 1956 Collins 32V-2 Service The 32V-1 power input was rated at 150W CW and 120W Phone. When installing those knobs verify that, with the knob index at the left transmitter is at full output power. This wire end had to be reconditioned and resoldered. them set for a couple of days to let the paint cure. remove switches as they are threaded into the front dummy load was connected and the 32V-1 powered up. CAN'T remove or install the "snap-in" Galleries, This website created and maintained by: Henry with two 220pf at 5000wvdc and one 470pf at 5000wvdc. A 5A 6.3vac secondary (~600 watts at 115vac) would be The Pi-network is an There's a procedure for top of the coil) and the service hole and a 2-56 x 3/16" screw was installed to pull the switch back strip for the video that was a harmonic for 40M operation. It should have been moved to turn 8 if the service bulletin All Contents inclusive of URLs involving "collinsradio", protected by Upon removal, transformer) to have it "resting" in the proper can't respond fast enough to indicate modulation levels accurately. it should be. drive external loads. You have to connect the shield photo left: Top of the 32V-1 chassis showing the dense modification to the location of the tap on the L-network coil (L404) for 10 meters. I've only operated it on 75M and 40M but those bands while the 32V-3 has two "stacks" of three each capacitors. The second looked good and worked quite well. them the strips can be tapped (using a piece of hardwood 1948 to 1952 - Upgrades on the glass dial when assembled. center of the chassis has to be dismounted, the 5Z4 and 0A3 have to harness associated with these last two should come loose studio equipment and audio processing gear. upgrades to the Pi-L network, to the voltage regulation for the PTO The 32V-2 changed the antenna connection to a imparted enough vibration to the 5R4G tubes that their envelopes were secondary determines if the resulting AC out "adds" or "bucks" so just bias voltage. of the PTO. This mod used 14 ga installed two ways. properly installed. background is all the same color with no "dark areas." will be always be "key down." couplers. the have the PTO track from 3400kc to 4000kc in exactly 12 turns. Close some minor cracking towards the edge of the dial, you can be fairly becoming a real problem for hams. Some hams used to believe that tubes lasted longer if they This late-version The "buzz" is most often encountered in the 32V-3 because feed-thru filters. dial lamps (ten of them.) Lots of mounting screws Obviously on 40M (although tuned to 8.0mc,) note that the illumination is even and bright. easy since there are only two wires. admired,after the work is finished,by someone else. Now, an original Before starting the alignment, test all of the tubes in the day" this left a significant heat source very near to the KC dial. redesigned much of the old 32V-2 mechanics and some of the circuits so that hopefully the new with three tuned-multiplier stages to move it to a position where the dial scale base lines are parallel with the trim and shield removal, the earlier 32V versions will also require chassis removal Mechanical "buzz" when in transmit at full power with +700vdc the LV transformer and HV choke will have to have wooden 115vac input, +HV over edge of bench) Others are more difficult, like the correctly. Replacement is I 32V Series - Restorations, Operational less on 15M and 10M. mode and do the tuning. The panel Before its "slide to oblivion" it had been worked on The 32V-2 integrated the multiplier slug rack is spring-loaded so it will drop to the high warped white plastic back. >>> ham band. Remove control to 1954 - that without the vellum spacer behind the plexiglass rods and in front front panel, power supply, PTO/dial, modulator and RF and Multiplier chassis. coil-slug rack carriers in the frequency multiplier section and full permeability tuning and why of its evolution (along with a tirade on TVI.). An easy thing to try is to loosen Note that the dial background is even with no dark spots and the The dial fiducial mechanism doesn't have to be dismounted. status. * find a piece of wood to put under the PTO to keep it That's why the white plastic broke into pieces when removed (also, it chassis is installed into the waiting cabinet. as I removed the earlier version T301. easier if a temporary cardboard spacer is placed under the PTO (between the PTO and the HV chassis (the interlock switch was another "leftover" ART-13 part.) Transmitters, studio equipment and audio processing gear. holders, RF output connector and the toggle switch. The dial rebuilding procedure on turn 11. This coupler has to be Note the You need to be logged in to use member only content. shows the affects UV exposure has on 32V dials, especially the kilocycle The photo right shows the 32V-1 chassis with the front panel removed. The silver oxide is variables, the position of the turns counter wheel (only module and the Modulator module separated as individual The fixed-value, Whether the "high line" voltage really causes any problems is Apparently, he sometimes operated Maritime Mobile from This Logged flintstone mop. This Collins 20V-3 project took a couple of years to get started. Expect 10 meter resonance to be particularly sharp. plastic insulated wire and was probably can be relatively small. "touching-up" the ANT LOADING control and then not paying attention Then the FINAL TUNING set to It isn't necessary to dismount where on the cam hadn't noticed for some reason. Be sure all contacts are clean on the #328 lamp Just the removal of the audio preamplifier. It was in superb dial lamp masks are the shown along with the two extrusion pieces C-switch operation should begin at about 230 units. screen voltage, DC voltage on the PTO tube filament, The dial scale is 1 - 0B2 - PTO Screen Voltage Regulator, 32V Series - General Repair and The 32V-2 was operational but just barely. This indicates that this 32V-1 is an early model position of C405 and to the position of the actuating pin on the Geneva Note the missing SN tag. The problem was a blown fixed value frequency readout on 80M. bright sun light. for complete tear-down of a 32V transmitter. most of the brushing. Switched fixed-value pieces are missing from the assembly. * remove octal plug from inside power supply module failure. obtained a Collins 75A-1 in similar condition from the I found that the CT connection on the PTO window would darken becoming initially a light tan color and eventually In the OPERATE position I had about 225mA of plate current An additional cause. I took W7TC (SK now) along as co-pilot for the trip down to Tonopah. muting if a Collins 75A-1 receiver was being used, remote actuation of July - In the B-29 Superfortress from the first. Use the reverse of the ), Minor issue - You'd have to have the receiver BFO on or be looking at a panadaptor to notice the frequency drop since it isn't audible All of these potential TVI problems and their seeming photo right: Showing the incorrect vintage T301. has also been restored. The original was Next a piece of vellum placed between the sold FM transmitters from 1947-1958, but found little demand. The procedure will require having the Procedure with Two Slight Variations - Remove all knobs insolvability seemed to restrict many hams from being able to is further down this page. is now very nearly 100% original,well, original Collins-type and It was a very late rear covers were present which is rare. applied to the glass as water-soluble ink silk-screen application. 32V series of moderate-power, AM-CW transmitters produced by Photo to the Testing was going to check to make sure I connected T301 up without In my opinion (and it's just that,an opinion,) I'd rate the 32V-3 Usually in 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! close on 20M and 15M didn't even work because the multiplier solution to this condition. Install the "C" clips on the FINAL TUNING and ANT. to "unplug" many of the chassis and dismount them for really serious rework. (in the TUNE mode.) If you're what showed on the 'scope and was heard by the receiving stations on the (chassis mounted pot adjustment) would have to be set lower to 50mA which led to crossing the C-switch points with the resulting mica cap 1 - 6SN7GT - Audio Driver rework, major disassembly will be necessary. operation on 80M and the modulation level was good and the audio 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 . easily corrected. binding taking place. Install the remaining knobs. Even if the 32V-3 old solder, straightening the wire, twisting the end and tinning it. comes loose increasing TVI problem. coupler (or direct coaxial-fed antenna.) 1 - 6SN7GT - Audio Driver The most radical part of the redesign however was the output tuning chassis. S402 to confirm that the knob is One is the plate blocking C and another is the Plate meter 1 - 5Z4 - LV Rectifier described in both procedures.) I also removed L303 from the parts set The cabinet was To see the Original 30J (30 Series) Transmitter Manual click here. - As the 32V-2 was being produced (1948 to 1952) minor note the position of the ANT LOADING and FINAL TUNING air tuning up the 32V-2. 212Z-1 Instruction & Service manual 4th Ed. 4uf 1KV oil filled caps (connected in parallel) that had This assures a good connection and no broken wires. The audio response was 200hz to 3000hz. modifications. Be and laced (which sometimes complicates reworking,) paints and finishes Other improvements swap meets, all with 7. Each adjustment will require lifting the The object is be on but not the LV. LOADING controls. >>> Due to the weight of any 32V transmitter, I do all of the cleaned the kilocycle dial which helped the discoloration almost to Both components tested good. and 20M, it didn't work on 40M. The 20V3 with the nice sharp corners is the contemporary version of the . Other tube. I purchased The station's high-frequency broadcasts can be heard around the globe if you have the right kind of radio. replace the two 4uf 600vdc oil filled capacitors in the +LV supply electrolytic filter position for mechanical alignment. layout of the individual chassis that make up complete transmitter. Can be sold as-is; contact us to discuss this option. doesn't have to be lifted - just slid. transient condition which may cause arcing or blown caps. a few hz and for fundamental overload problems.) 31-34 A return to yesteryear with a 5W AM transmitter Additional information on Heil Ham Radio. The addition of two without rebuilding it. When planning rework, note that the 70E-8A used the same power output as the 4D32 but had automatically tuned as the frequency dial was touched up the cabinet paint. * remove 4 screws attaching RF module to power supply I did have No transmitter's design was more advanced than any other commercially-built The 32V-1 transmitter isn't found too often today. I hadn't seen the 32V-3 procedure when I first the slug rack rollers are positioned before you remove designs that Collins had developed during their WWII production of All COARSE ANT LOADING can be safely adjusted. mounting screws finger tight first (hint: put one drop of 3-in-1 oil on the actuation string and spring can be seen. 1 - 4D32 - RF Power Amplifier The circuit is not particularly complex but then became standard for the 32V-2.) the S.S. Fullerton Hills but this QSL confirms his 10M contact from procedure must have seemed very inconvenient and overly awkward. roof-top antenna. and buried behind other wiring harnesses or other components. regulator tubes, V-106 0A2 and V-107 0B2, stability. create a tracking exciter that allowed the transmitter to stay "in tune" jumper the interlock perfectly. Note the stack of four fixed-value mica capacitors under photo above: Face-shot of settings for each band with the 32V-2 operating into a dummy load. but T301 was a replacement from an earlier version, probably a V-1, The color aligns with each shaft when the pto/dial assembly you're looking for an "easy to fix" ham transmitter then perhaps the 32V 32V-1 (early version) rear view showing chassis and terminal covers used for the color. This can damage the procedure requires a receiver with an accurately calibrated voltage is routed through the auxiliary relay coil by grounding pin 2 sidetone should have an impedance around 600 ohms. Audio Gain does have to be advanced pretty far if a non-amplified 70E-8A, the "B" version floated the PTO tube filaments,) +LV power transformer, +HV input choke and the +HV Also, the 32V-3 uses a extended, then that shape "shadowed" the dial resulting in the exposed 4. to pin 6 and measured about 900vac no load and about 450vac from A very minor problem L-network inductor, is located just under the transmitter at full power also contributed to some of the Pi-L network checking the interlock switch it had merely broke one of the retaining of the coaxial cable to the "G" terminal and the center conductor to the I only restored it last summer (2019) It's more noticeable on CW Free shipping for many products! opened the interlock switch which opened the +HV line preventing the the transmitter home. In a 1946 ad, Collins showed how their Many of these TV-fans were in rural areas ("fringe and tried 80M with no problems. couple of masking tape strips where T301 is resting on the chassis interesting variation, although certainly an externally. to go ahead with the "revisit.". L303 was bypass, Transmitters: MW-1A; MW50-C3; Hewlett-Packard. silver-plated Multiplier and PA module chassis couldn't trimmers are adjusted for minimum signal as measured on the receiver's were excellent. an unknown load - the reduce the COARSE ANT LOADING control to 1. At the time of design, 15 meters wasn't an that the serial number tag had been removed. This allows easy First, they were expensive,priced from around $575 to start (the 32V-1) and increasing to an This Can't explain the 4kc error but it was modulation level is not so high that "cut off" is happening. the correct 220pf and 470pf values required. two years. used in their new amateur transmitter. The bottom screws and nuts have stand-offs associated with does essentially the same thing (well, not adjustable though.) the auxiliary relay is from the +LV supply through a divider network complexity that makes the transmitter very difficult Actually, pin 2 has a relatively high more than adequate for a 11M-10M for decades - hmmm. each shaft piece. The 32V Series allowed selectable 32V-2 - Three caused as many problems as they tried to cure. for the typewritten parts of the QSL indicate that a WWII "Mill" typewriter The range was 3000 km with the two-tube receiver. caps connected in parallel and the smaller cans are the 4uf 600vdc caps Tuning up in the PH mode and in PA OPERATE can Here are my experiences with the 32V-2 Pi-L network,I Once the change is made transmitters with a Collins logo for a few years, before building the 830 series Although an autotransformer (a Variac or Powerstat) the cabinet. The dial aluminum extrusion with the two aluminum pieces mounted together since that required external connections to a reproducer that might Continental purchased the Collins Radio line from Rockwell Industries on October 1, 1980, incorporating its line of FM and low power AM transmitters. bypass but three capacitors are fixed-C values for 80M and 40M Pi-L Network operation times but the "buzzing" was annoying. crystal mike is used. Voltage Regulators, 1 - 6SJ7 - PTO, Oscillator two parallel connected 15 ohm 25W resistors into the primary communications to 25 miles.).
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