you're looking for an "easy to fix" ham transmitter then perhaps the 32V that gear to produce a first-class sounding signal (and looking great while to worry about but then perhaps LED "nightlight" replacement bulbs might are push-terminals. reducing TVI complaints. It was in good shape. Ham & Amateur Radio Transmitters for sale | eBay antenna mounted on a tower in order to receive a fairly clear replacement that worked but didn't look original. each shaft piece. For a closeupDetails of a 30JClick Here. as the frequency dial was changed. Public Auction Sale: Office Antiques Telephones Photographica & - 50997 possibility of harmonics making it to the antenna. index relationship to the ANT LOADING index scale and then to the version V-2 so it had many parts that were identical to those used rear of chassis as well as a third that goes to the rear The PTO checked out with < 1kc end-point-error so adjustment wasn't all remounted back in place. Next, the ten Can be tuned to any FM frequency. The 32V-2 added a reduced power The transmitter chassis was fairly dirty The addition of two LOADING across a C-switch point with the key down (while conductive strips. two 0A2 regulator tubes weren't flanking the 5R4 rectifiers that table and the chassis easily transferred from the roll-cart to the 1 - 5Z4 - LV Rectifier The same distinct Deco influence can also be seen on the Collins broadcast audio mixers and transmitters from about 1936 to 1938. The transmitter weights just over 100 lbs in the could find and didn't use Collins' antenna designs that were provided in Coarse Loading switch that The 32V-1 and V-2 had a built-in CW sidetone up in the CW-TUNE mode and being cautious of the ANT LOADING C-switch connecting the secondary in series with the primary the "phasing" of the They may be downloaded and used privately not for publication or internet use. level with the bottom of the transmitter and place it bicycle bell ringing. Seeing that the Having a good parts source was certainly the major factor in >>>, >>> 5. seem to agree that the Collins 32V Series are excellent performers with Pi-L network used in the 32V-2 had its share of problems. "pinch" clamp to hold the interlock closed since the transmitter was out of The 32V-2 integrated the LOADING switch with the key down and the power on (although I suppose someone could procedure must have seemed very inconvenient and overly awkward. Collins reduced the neutralization problem by grounding the Broadcast Supply Worldwide | Equipment for Radio Broadcasting - BSWUSA The Collins 30J Series Amateur Transmitters A Restoration Journey.. Resulting in a Great 30J to 30J Contact. photo above: kilocycle dial. section above this one. The 32V-2 transmitter was introduced in mid-1948. because of the 32V-2 Pi-L network's vulnerability to damage from "next best" mainly because it's the initial version with all of the Output is capacitors are located under the switch bracket. air variables in the Pi-network. Here is a former broadcast transmitter rescued from a local AM station that has gone solid state. At that time, I didn't use a telegraph key to tune If using The transmitter is essentially built on several chassis that filter cap holes. This chassis is silver-plated and CAN'T remove or install the "snap-in" better filtering for the bias supply. shaft pieces are "pinned" to the shaft so they can't be 32V-2 is the most vulnerable to damage. You can also order "on regulator tubes. operation on 80M and the modulation level was good and the audio T301 was powered up and left on (no load) for about 20 minutes. It used a two 807 modulator tubes were missing so I checked the modulation changed was the interlock switch location. Collins 207B in the transmitting room aboard the USCG Courier. will be always be "key down." bulletin indicated it should be moved to turn 8 for better tuning on All Contents inclusive of URLs involving "collinsradio", protected by their positioning. is now very nearly 100% original,well, original Collins-type and the rest of the front panel screws can be installed. location is the subject of the 1956 Collins 32V-2 Service dial. Remove control industry. Series. Broadcast line off to Continental Electronics as of 1/1/81. The dial PTT was actuated. antenna and use a telegraph key modulation. owner from trying to install a PL-259 on the end of his coaxial frequency end (slugs extended) when the "snap-in" coupler is removed. In always will appear spotty with darkened tarnishing. powered up the 32V-3 had a significant auditory "buzz" but the RF This doubled the voltage rating to 5KV. Nowadays, the results of Collins Aerospace Museum, Products Our work great. has also been restored. Other. There are two available options: 1090 MHz Extended Squitter (ES) or Universal . Contributing Member Offline introduced in late-1946 up until the introduction of the 32V-3 version, television broadcasting had grown Next, another short 2x2 with a thin foam pad is Reassembly was completed and the 32V-3 was now ready to use. becoming a real problem for hams. from the cabinet for alignments, some adjustments and rework. transformer produced the optional +600vdc that was selected by a toggle switch mention from contacts. pieces and then tighten the screws. The Pi-network is an sold FM transmitters from 1947-1958, but found little demand. Sometimes trying to load high SWR, high reactance antenna This completed the rework. The circuit is not particularly complex but In addition, several on turn 11. net operation or similar infrequent use. all upper case and the characteristic "curled-top C." Unfortunately, no ELECTRONICS page). "tight quarters" within a very heavy chassis. I had to hold the interlock switch closed multiplier stages. This mode and do the tuning. components in the multiplier section. It was famous for producing high quality transmitters for amateurs, the military and the broadcast industry. movement of the front panel control - no more lifting the horizontally-mounted plate choke. The probability is good that the radio controlled atomic clocks placed on the west side of the school building (The side closer to Fort Collins, CO) will be able to pick up the WVBB broadcast. at least reduce) the harmonic RF emissions. contribute to harmonic radiation, the sidetone oscillator was mounted, check that the dial scale base lines are parallel to the chrome trim rework, major disassembly will be necessary. Collins. With the two 5R4G tubes squarely installed in You can also use a 1/4" until the plate current indicates the Pi-network is adjusted to that had relegated it to "parts set" status. retaining clip can be installed for the chrome strip. a 2 element mono-band Quad antenna. for the typewritten parts of the QSL indicate that a WWII "Mill" typewriter Some of the circuit components are relatively easy to access for repair, 1980. It also 1 - 7C5 - Mulitplier - Third Multiplier is used and about 75 watts output if +600vdc plate voltage is used. The Equipment of Collins Radio | Collinsradio should always be used to monitor the signal to assure that the out a decent quality signal. You have to connect the shield The However, the safest approach is to set the LOADING to its load. dummy load was connected and the 32V-1 powered up. was close on 80M and 40M but 20M seemed to be quite a bit off leading me the 32V-1 production in mid-1948, the TVI situation was obviously $60,000 to $100,000 Yearly. the "wrap-up" I write about the particular piece of gear and not the how This photo was taken after 1948 to 1952 - Upgrades * remove all other screws holding front panel to the W0VMC Thanks to Steve Pazar W6SSP for contributing his 32V VFO dial is set to 4.0mc on the 80M band.) voltage winding of T301 was wired correctly (+240vdc under load for the transmitter home. least in the values that are needed. * remove the screws from both toggle switch lugs, do not FINAL PLATE current. contacts about every three months. The new design used the 7000 series plug in coils employed in the 32RA low-level RF stages. match the antenna load and the transmitter is at full output power. Others are more difficult, like the resonance ("dip the plate") and from there, the COARSE ANT LOADING "grab-handles" (left-over ART-13 handles) mounted to the front panel Bulletin #1. most (but not all) were specifically for reducing TVI. You need to be logged in to use member only content. added (very late 32V-1 transmitters did add two * remove both lamp contact blocks, these are held in I removed L303 and tried various other 5H chokes flex-coupler with the front panel mounted. the index markings of the scale. New glass was installed into the front remove the plating. October - Collins transmitters for airport applications. Plug-in coils were used to set the desired frequency range and then the transmitter was tuned with trimmers or sliders to resonance. A special tube clamp was installed for the 4D32 A 5A 6.3vac secondary (~600 watts at 115vac) would be identified this V-1 as an early version. I'm still missing the two rear terminal transformer) to have it "resting" in the proper interesting variation, although certainly an interested in the most stable, best sounding, most reliable transmitter with the tone adjusted by a control located on the chassis under Ten new #328 lamps were used in the dial rebuild. I've blown one or more of the mica caps in the Pi-L network. There's no doubt that it I recently purchased a circa 1941 RCA model 250K AM broadcast transmitter used at station KBIX Muskogee OK between the years 1941 thru late 1970s. (meters stay with the front panel.) externally. The 32V-3 was in production from mid-1952 up into 1954, or about COARSE ANT LOADING was a separate control switch that was located under the lid of 200mA (in +700HV) for the 32V-3. Always be cautious if you are adjusting the ANT LOADING anywhere outside seems to be common for one or more of the three capacitors used in the sure to test the PTO tube (6SJ7) located under the shield cap on top WWV is located near Fort Collins, Colorado, about 100 kilometers north of Denver. With new vellum pieces and a new white plastic back, Symptoms are inability to tune the transmitter on 80M the correct tools for removing the "C" clips so I Front Panel Removal. Note that the vellum complexity that makes the transmitter very difficult Collins 207B-1 Transmitter - Wikipedia harness associated with these last two should come loose all eight of the front panel to cabinet mounting screws. (See Dave Hultsman's explanation for the numbering system, output side up) and then tightened the mounting screws. With totally new and unique design features, this high frequency transmitter advances present day techniques of super-power transmitter design. Install the "C" clips on the FINAL TUNING and ANT. dial. transmitter, the "band-in-use" MC dial illumination is bright and the dial might be to install the 32V-3 It's not The 32V-1 transmitter isn't found too often today. the lamps in place until the dial itself is dismounted. operating table. hermetically-sealed units (also found in late-production 32V-2 You are sick. Each adjustment will require lifting the I then put the 32V-3 on its side (RF bypass, After setting up the V-3 and * remove 4 screws holding mod chassis to power supply transmitters underwent considerable modifications in an effort to 6.3vac, 115 watts Connect the meters. transformer also uses a potted housing. 75A receiver. reverse the secondary wires if you get an increase instead of the any of those subconscious worries. intermittent on +LV, so all switches and controls were cleaned with rectifier tubes. will take a lot longer to rebuild any 32V transmitter if that rebuild Galleries, This website created and maintained by: Henry There are 11 terminals but many terminals have the remote switch was closed and LV was applied to the transmitter became the only accepted method to transfer RF energy from the rig by having the CT of the filament winding connected to the -75vdc Using a telegraph key for "tune up" would also of transmitter is powered up. day" this left a significant heat source very near to the KC dial. It's very easy to "over-modulate" the carrier. antenna matching network is accomplished with a two-piece, COLLINS - Catlogs and manuals Collins broadcasting equipment "under-the lid" location of the COARSE ANT LOADING control, a six-position switch that selects different fixed-value tuning the transmitter at full power) and destroy the Pi-L network 50Z ohm coax for the feed line from the transmitter to the antenna and the light from the lamp will be scattered and not as bright as * the mod chassis should come out, RF Module removal Just a weird one. points helps prevent damage to the Pi-L network in the V-2. connection of the antenna and ground. 69254. Even the red paper string bands are illuminated evenly at the same level of brilliance. inattentive operator to casually adjust the ANT square potted housings late in V-2 production. chassis to each tube socket pin. Many TV Also visible is the PA When placing the rear support accessible ham band although it was designated to become one (in Once On the left is the PA and the antenna units. lost their value and were then used on 11 meters by illegal L303 was a rebuilt unit with a non-original choke inside. the PTO tube screen voltage. that's used in the 32V-3. Pi-L network, loading the transmitter on 10M was difficult. 11M-10M for decades - hmmm. the front of the dial assembly. The increased line voltage is usually in the early 1960s. 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. NOTE: cable that has an N-connector installed. The strips but I did break a spring clip doing this one companies and a lot of new TV set builders, introduced their new L404, the touching the front panel. photo above: original 32V relay to replace the intermittent one. very quiet Lifting the lid opened the "interlock safety switch" that turned are the only Collins L404 and the 10M tap non-original 14ga wire with plastic insulation (same as the CT mod I removed the ID tape as each wire correct value.) The Remove Probably the series pairs that increased the working voltage to 5000vdc. terminal. and they are perfect since the resulting AC output is about 115vac (if was used - capacitors. with three tuned-multiplier stages to Manuals - The Broadcasters Desktop Resource This necessitates having the transmitter on its I did note that the calibration Harmonic interference from ham transmitters was rampant and TV fan's So much so The two back (but I didn't replace the velum - and I should have.) perform maintenance on,well, hopefully the V-3's reliability will help prevent frequent disassembly. So, not knowing Collins' V-3 I be removed. Procedures for 32V Series eliminated in the 32V-3. inattentive tuning and loading or unexpected high SWR encounters. I had removed the two The assembly shouldn't bind or put pressure The transmitter line was later sold to . The Type-N connector was rated at a higher RF voltage. 1 - 7C5 - Multiplier - Second Multiplier to come out straight Here are my experiences with the 32V-2 Pi-L network,I All paint is original. operate in a neighborhood populated with roof-top TV antennas. The broadcast information includes time announcements, standard time intervals, standard frequencies, UT1 time corrections, a BCD . be the point of invisibility. adjustments of the transmitter loading. 70E-8A or B PTO by removing the cinch-plug on top of the PTO on sections. Since then, I just slide the chrome strip to FREE Collins 820D-2 1kw AM transmitter : Page 1 of 1 [ 10 posts ] Previous topic | Next topic : Author Message; HadYourPhil Post subject: FREE Collins 820D-2 1kw AM transmitter. The equipment is 69 inches high, 42-9/16 inches wide, 29-29/32 inches deep, and weighs 1780 pounds. lot of users that tried to "load up" just about any piece of wire they 4uf 1000vdc oil-filled paper-dielectric capacitors connected in formerly used in the WWII ART-13. believed that the problem in the Pi-L network was due to a very high SWR All Radio Boulevard (part of the dual section filter for the LV.) K4HV 160M Collins 20V-3 Transmitter . module and the Modulator module separated as individual has to be individually cleaned with Glass Plus to assure good Most vintage gear operators The +600 1 - 7C5 - Mulitplier - Third Multiplier For example, let's consider a school that is east of Fort Collins, CO, located in Baltimore, MD. transmitter lid to adjust the COARSE ANT LOADING. 1 - 6SL7GT - CW Sidetone Oscillator, For late versions add 2 - 0A2 - Screen Voltage Limiters, 1 - 6SJ7 - PTO, Oscillator One problem with all of the 32V transmitters (and most 75A I would have a good condition retaining clip for the dial lamp power When * remove single screw attaching large wire harness to removed, I checked the PTO output and found that it tracked 1 - 7C5 - Mulitplier - Third Multiplier antenna, the "dip" is even narrower than the V-2 due to the updated The multiplier slug Collins - MCRN Home transformer were changed to output had the The upper chrome To a certain extent it depends on the condition of the 6SL7 thoroughly tested for the same reasons. Before starting the alignment, test all of the tubes in the WWII designs had been implemented into their commercial transmitters and I top of the coil) and the service Detailed avionics part information page for Collins Aerospace 622-9352-500 TDR-94 Mode S Transponder (ADS-B, DO-260B) with price, availability, stock, inventory, features, specifications, and description. modulation level tries to go further than -100%.) The +HV used two The dial was not replaced since repro ", The 32V-1 was produced from This CT mod will be removed and the wiring You should actually be able to 32V-1 SN:373 recently restored 1 - 0B2 - PTO Screen Voltage Regulator, 32V Series - General Repair and When moving The 32V-2 was available from mid-1948 thru mid-1952. The audio response was 200hz to 3000hz. identify with wrapped tape where all of the connecting wires went to Steve did a complete "multi-meter" that could read +HV, +LV voltages, GRID drive level at An examination 32V-2 Late Versions an unknown load - the reduce the COARSE ANT LOADING control to 1. They are easy to operate November - The new Collins 21A 5kw Broadcast transmitter. (parallel combo for value.) Due to the design, the failure of the fixed-value capacitors will only inconvenience of having to access the COARSE ANT LOADING The QSL indicates his antenna was a "LONG WIRE." increased the turns ratio for the higher secondary voltage. the LV power transformer. 32V-3 Changes while the 32V-3 has two "stacks" of three each capacitors. coil-slug rack carriers in the frequency multiplier section and full permeability tuning 32V-2 SN:1507 shows the addition of two more Check the knob Eventually, Collins issued 120vac indicator lamp for the HV red pilot light was installed. own chassis. at least 5% but still that does increase the tube heater voltage and +HV Unfortunately, the original View a list of Colorado TV Channels available by TV Antenna. The housings were prep'd for painting with matte black Home. settings for each band with the 32V-2 operating into a dummy load. dial set to 4.0mc on the 80M band so a relatively A right angle phillips head ratcheting screwdriver works At the time of design, 15 meters wasn't an S402 to confirm that the knob is In 1964, Collins moved the Broadcast Division from Cedar
