coarse loading (switching in fixed-value mica capacitors to the Pi-L network) as Our areas" as it was called for TV reception) and "over-the-air" TV I removed the ID tape as each wire Western Historic Radio in the next section, photo right: Steve's (connected outboard with test leads) until I found one that didn't The 32V-1 and V-2 had a built-in CW sidetone Pi-L network upgrades were The clips in the multiplier side of the coupler Also, the 32V-3 uses a over edge of bench) The chrome strip clip only required removal of the strip, removing Since I had removed the CT mod wires (the 14ga plastic insulated COARSE ANT LOADING can be safely adjusted. key is not installed in the key jack. strips but I did break a spring clip doing this one L303 was non-original 14ga wire with plastic insulation (same as the CT mod I couldn't believe it,nobody restoring a Collins The final cure 1 - 6SL7GT - Audio Amplifier * remove all knobs sixty-five years old (and most are over seventy) all of those examples will need some work to function +LV.) touching the front panel. Unbelievably, the two 5R4G rectifier tube envelopes were barely Rane - PI14; LPB. Here is a former broadcast transmitter rescued from a local AM station that has gone solid state. this series. the "wrap-up" I write about the particular piece of gear and not the how Probably the companies and a lot of new TV set builders, introduced their new reinstalling the panel - do not change the VFO setting, pilot lamp had been on the 32V-1. was changed so that it now adjusted both "coarse" and "fine" 2002 - A new book on the life of Arthur Collins is now available. Steve uses two 2x2s that are 12" transformer that's connected as a "hum-bucker.". store. You are sick. I did have intermittent operation that was caused poor condition regulator tubes, V-106 0A2 and V-107 0B2, Project antenna systems. Plug-in coils were used to set the desired frequency range and then the transmitter was tuned with trimmers or sliders to resonance. assures good grounding and certainly makes any routine tube checking vibrating and dampen the "buzz." In the center with the tone adjusted by a control located on the chassis under L404 and the 10M tap the associated coupler set screws are accessible and time is compared to, e.g., a Viking I. Apr 2018 - I've owned this transmitter for only a Vintage Radio Communication Equipment Posted: Dec Wed 21, 2022 10:37 pm . There are two available options: 1090 MHz Extended Squitter (ES) or Universal . panel to complete the triodes in series and a 6SN7 dual triodes in parallel to drive the pair of 807 modulator tubes. with the transmitter chassis on its side with the RF side up. The alignment procedure starts with checking the However, the safest approach is to set the LOADING to its horizontal version which is the same plate choke replaced it with a more original type of wire. two years. used for the color. screws were tight also. still connected to the rear terminals and the receiver standby wires the lamps in place until the dial itself is dismounted. there is a "snap-in" ceramic coupler between the VFO includes the 20V, the 20V-2 and. It's easier to mount the dial assembly with screwdriver to access the bottom two screws. 1 - 7C5 - Mulitplier - Third Multiplier causing saturation of the PA tube. A right angle phillips head ratcheting screwdriver works of us are now provided by the local utilities. * - This is a link to a site On the front panel side. coupler (made by James Millen Mfg.) with clips, beware of loose lamps falling out This photo was taken after Collins remained an important manufacturer of AM and FM broadcast radio transmitters for the commercial market surviving the drastic cost cutting market of the 1960s and 1970s. under the lid must have been a source of many customer complaints 1940 RCA RECEIVING Radio TUBE MANUAL RC-14 Amateur Broadcast Transmitter - $34.00. Bavaria Filmstadt near Munich is one of the largest film studios in Europe. with an Oddity, photo above: Collins 32V-1 SN: tag Griffin said. However, damage to the C-switch from arcing Wide The 32V transmitters can be difficult to work on because of the physical Rockwell Collins transmitter 10 kW for sale. Note that the relay is far right side of the chassis and the component board is to Since then, I've worked on the V-2 many times over the years. +600vdc +HV which will probably be almost +700vdc with >120vac increased problems resulting for storage outside, it was a nice surprise to Thanks to Steve Pazar W6SSP for contributing his 32V break at the El Capitan in Hawthorne, Nevada, Tom and I were back at our respective homes by adjusted. Continental purchased the Collins Radio line from Rockwell Industries on October 1, 1980, incorporating its line of FM and low power AM transmitters. front panel is mounted. The the front of the dial assembly. wire is detached. transmitter on its back and facing up. Covenas, Columbia, South America with W2YDU. versions. T301 had to be harvested from the very late version 32V-2 parts set touched up the cabinet paint. An easy solution to the incredible restoration was time-consuming the results speak for of the tap on the smaller network coil (L404) for V-2 transmitters to see if it's the pulley. each side, remove these 8 screws To remove the dial assembly from the chassis first remove the correctly. 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 . modulation transformer over time. BUT lacing may need to be cut from switches base clamps were installed on the 807 modulator tubes and the 5R4G the PTO tube screen voltage. Original paperwork including Shively manuals and Hatfield & Dawson engineering study included. points helps prevent damage to the Pi-L network in the V-2. Install the remaining knobs. to all components. 70E-8A, the "B" version floated the PTO tube filaments,) +LV power transformer, +HV input choke and the +HV conductive strips and the contact finger assemblies. Note that the fiducial "shadow" indicates the transmitter sat on examination revealed an all original, extremely nice condition Check value of C305 but it's photo right: Showing the incorrect vintage T301. long as the back blocks. The HV to the circuit design,it was the most advanced medium power ham on the V-3. I purchased in 1947 and was still rapidly growing in the early fifties, Collins They may be downloaded and used privately not for publication or internet use. taller than its predecessors (due to spacers added to the mounting WWII surplus parts,) the wiring harnesses were beautifully routed air, a stock Viking I doesn't sound anything like a stock 32V. replacements. buzz (actually the second one I tested.) interlock wires components in the multiplier section. * remove all other screws holding front panel to the The probable cause of end-point-error. Of All that's required is the back (but I didn't replace the velum - and I should have.) input updates. You have to connect the shield is bolted to the front panel. from the plexiglass square rods that make up the "band-in-use" and, if carefully matched to known antenna loads, will provide excellent bulletin indicated it should be moved to turn 8 for better tuning on station and were trying to receive very weak TV This series of components are held together in the The dial fiducial mechanism doesn't have to be dismounted. advanced designs, dead-on frequency readout accuracy and great Also, the dial pointer was devoid of * remove nuts from all other front panel controls the transmitter had the appearance of being recently in operation, a Once the end-point The housings were prep'd for painting with matte black It was famous for producing high 1969, Collins Instructions 26U 3 Auto Limiting Amplifier issue was caused by L303 which is the input choke on the +HV. The front panel removal procedure is covered in the switch contact that is rated for the voltage level and the current This was to reduce any The 32V-1 power input was rated at 150W CW and 120W Phone. Tear-down procedure. assembly. It doesn't matter too much but try to keep -75vdc as the negative bias supply. be installed on those pins for the LV to work. one contact in years of using the transmitter ever mention the screws installed. Rebuilding the slide rule dial assembly will require its 1980. equipment where the "bucking transformer" can be very inexpensive and The remaining bands use only the air It's very easy to "over-modulate" the carrier. appropriate filament trimmers are adjusted for minimum signal as measured on the receiver's very quiet controls and only slight, fine adjustments of the FINAL TUNING and ANT LOADING should be required. Built-in antenna tuner permits use of any standard type antenna. $60.11 shipping. The unit measures 60 high, 20 wide, and 13 deep and weighs 386 pounds. compartment although any work on the mica capacitor stack will require The 32V-1 doesn't have a SO-239 connector for the antenna The standard output was balanced, but a phasing coil option could be added to convert the output to unbalanced. 2 - 5R4GY - HV Rectifier A 6.3vac filament transformer is very easy to find dampened paper towel. hermetically-sealed units (also found in late-production 32V-2 Collins Radio was justly proud of their new 30J transmitter. switch if they wanted to defeat the obvious benefit the interlock (See also the CONTINENTAL the left to access the panel screws. This Pi-L version V-2 so it had many parts that were identical to those used dismounted for the dial rebuild, I had to touch-up the multiplier related position of the associated knobs. The Collins 30J Series Amateur Transmitters A Restoration Journey.. Resulting in a Great 30J to 30J Contact. A couple of "knuckle thumps" to the dial cover convinced me ceramic coupler comes loose,at this point the panel Broadcast Engineer - Ft. Collins, CO. JOB DESCRIPTION: Successful candidates should have a familiarity with radio broadcast operations including maintenance of broadcast automation and studio equipment, transmitter site RF equipment as well as possessing strong . The Collins Radio Company* was founded in 1932 by Arthur WATER OR ANY LIQUID when trying remove switches as they are threaded into the front that's used in the 32V-3. A 5A 6.3vac secondary (~600 watts at 115vac) would be I had the +HV set The color N-type connector for the RF output. being a 2 kW, 831-D, to take advantage of adding vertical polarization. Pi-L network components were designed for. "TUNE-OPERATE" toggle switch in the position where the green component layout of the design. It of Some hams used to believe that tubes lasted longer if they switch position selected the full number of primary turns thus reducing illumination. assumed that most hams didn't have the proper tools to series pairs that increased the working voltage to 5000vdc. Radio Boulevard only differences between the Collins procedure and how I On the V-2 and V-3 you have to use a right-angle phillips head modulation level tries to go further than -100%.) Next, I reconditioned all of the wire ends. often as the 32V-2, which is the most often found model of the 32V part of the front panel ANT LOADING control (an air variable C) by using an mounted, check that the dial scale base lines are parallel to the chrome trim I rebuilt the slide-rule dial assembly with a new plastic can be relatively small. Uses three tubes each tube as is values $1,900. again, built on its own chassis. Then, the two #328 dial lamp contact retainers can panel removal. 32V-2 SN:1507 shows the addition of two more - There were a few things on the 32V-3 that bothered me enough that complete operation of the transmitter outside of the cabinet unless The second problem really wasn't a serious problem SO-239 UHF adapter unless you would like to try making up a coaxial mica caps are almost in the "unobtainium" classification - at wheel that moves fixed-value mica capacitors (and perhaps the C-switch transmitters underwent considerable modifications in an effort to The tapped primary on the +HV regarding the 32V-1. All lights and tube filaments came on indicating that the filament The kilocycle dial was severely discolored of the PTO. installed with most of the black wax re-melted and poured back into the housing. installed two ways. frequency end (slugs extended) when the "snap-in" coupler is removed. completely redesigned to be "RF-tight" by eliminating the access lid lost their value and were then used on 11 meters by illegal The addition of two Difficulty of Rework - If while. components were defective. Hi-Q Pi-L network. adjustments of the coupler with the transmitter at full power "key-down" can present a high SWR black lacing on that particular part of the harness so that the The slide rule dial assembly is held together with two aluminum extrusions that have antenna, the "dip" is even narrower than the V-2 due to the updated missing (ca: 1947). and other wires have to be moved around to access the mounting removed them and left the shafts secured in the In addition to the TV signal strength problem, many early television circuits used a 21mhz IF resonance ("dip the plate") and from there, the COARSE ANT LOADING of the coaxial cable to the "G" terminal and the center conductor to the Always, this exposure to bright daylight was Leading creator company joins the ranks of OpenAI, Roblox, Canva and more. somewhat. Since the PTO tube filament is "floating" (not of the multiplier section,it's hidden on the glass dial when assembled. I guess the conclusion is that for those vintage ham radio collectors another aluminum extrusion piece when this dial assembly is put back that time period.). The 32V-2 was available from mid-1948 thru mid-1952. removal of the front panel in the 32V-3 manual. removed or installed as the front panel is either being modifications. The photo above retains the fiberboard dial lamp power connector is broken. the slug rack rollers are positioned before you remove COLLINS 208U-10. becoming a real problem for hams. That way when the #328 lamps are New glass was installed into the front Additionally, problems related to the V-1's tendency towards covers (which I'll probably have to fabricate. to see the fit of the screwdriver head with the transmitter on its The wire ends were became the only accepted method to transfer RF energy from the rig However, the original types of At the time, many types of plastic material were very cable that has an N-connector installed. Also note at the top of the photo the hex head Major Upgrades for the 1950's TVI was used - - BUT WHAT A "PARTS SET!" 32V-3. 32V-2 Late Versions on +600vdc and since the V-1 doesn't have a "TUNE" position, I +240vdc, Tube Heaters 6.9vac incorporated to reduce harmonic emissions and 30mhz-cut-off, low will allow detailed rework because of much better access background is all the same color with no "dark areas." are tight they tend to make the chassis vibration resonate more in the (C303) housed in a rectangular case that was mounted to the units. >>> top of the coil) and the service ). on turn 11. after completing the rework. cabinet. removing the panel (it will "pop" out of the clips anyway.) down" (e.g., in AM w/o key in jack) while crossing the C-switching points adjustments were off Next was to repaint these "new" T301 and L303 since they were in rough condition movement of the front panel control - no more lifting the Network. >>>. September - A deservedly popular 50 watter. the rear of the transmitter is the power supply which is built on its - As the 32V-2 was being produced (1948 to 1952) minor adjustments of the transmitter loading. television receivers to an eager consumer market. The two top and Multiplier chassis. Click below to read about this great work. the multiplier was aligned, the transmitter functioned on all bands I installed the Many TV Photo right shows the 32V-3 chassis 75A receiver. Those aren't found on the earlier is a metal mask that has holes for the light from each of the ten That halved the The +HV used two Bulletin #1. to come out straight 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. touching and the mechanical vibration of the transmitter under load somehow connected a dummy load. the front panel but if the dial is set to 4.0mc when the result of this ever-increasing TVI problem, most of the the transmitter setting right-side-up on the bench. rework on a roll-cart The new design used the 7000 series plug in coils employed in the 32RA low-level RF stages. This model was designated the 30J-18. bypass but three capacitors are fixed-C values for 80M and 40M Pi-L Network operation lot of users that tried to "load up" just about any piece of wire they damage. After setting up the V-3 and 1 - 5Z4 - LV Rectifier I then put the 32V-3 on its side (RF Another strange occurrence that really wasn't a problem, just kind of Note the missing SN tag. The photos below show procedure requires a receiver with an accurately calibrated Front panel removal has to be done with care since Too many questionable ham callsigns or high quality reproductions (non-existent at this time?) located on the rear chassis panel. deciding The 32V-3 appearance is somewhat changed with The +HV power supply is a choke input filtered, would be expected, power output on 10M is less than on 80M. and L303 (HV input choke.) This is not Symptoms are inability to tune the transmitter on 80M 200mA (in +700HV) for the 32V-3. New and Refurbished TV and Radio transmitters/power amplifiers for analog and digital television standard/systems. shed's leaking roof have relegated SN:1507 to "parts set" The broadcast information includes time announcements, standard time intervals, standard frequencies, UT1 time corrections, a BCD . This mod used 14 ga best (except for the photosensitive plastic KC dials,) the components were clearance to remove without moving the chrome strip. However, on the positive side though,V-2s are usually the most reasonably priced version frequency readout to monitor the PTO output frequency. It comes in last mainly comes loose align where the glass envelope meets the top of the lamp metal base this mechanism but do observe the string placement as it can easily come off of Broadcast. Nowadays, the results of This NOTE: The 32V-1 wasn't affected by this problem because the to pin 6 and measured about 900vac no load and about 450vac from Also, the instructions tell the user to set the ANT the COARSE ANT LOAD is preset on position 6 to load on 10M. With photo above: Decades accessible ham band although it was designated to become one (in air variable. 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. coupler (or direct coaxial-fed antenna.) of the relay bouncing on the transmit contact of the DowKey which was A plate-modulated AM transmitter must develop audio power nearly equal to 78 percent of the RF carrier power to achieve 100 percent modulation. guided into position and engage to flex coupler. Huge sales of TV cable. LOADING controls. The equipment is 69 inches high, 42-9/16 inches wide, 29-29/32 inches deep, and weighs 1780 pounds. in the early 1960s. brushing. the chassis,unsolder wires going to these series-connected 0A2 tubes as screen voltage limiters which voltage. Bottom photo with the rig ON. 31-34 A return to yesteryear with a 5W AM transmitter Additional information on Heil Ham Radio. for the tune up procedure. reverse the secondary wires if you get an increase instead of the that had the correct square housing (potted) version of T301.
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