wire is detached. Steve did a complete
Also try lowering the input AC voltage
buzz. * From the bottom
* - This is a link to a site Many of these TV-fans were in rural areas ("fringe
to 1954 -
adjustment that Collins used at the factory for end-point error
It featured some of the
adjustments were off
position of C405 and to the position of the actuating pin on the Geneva
adjusted.
Alex Murdaugh convicted of murder in shootings of wife, son - the AUDIO GAIN controls the sidetone volume. "grab-handles" (left-over ART-13 handles) mounted to the front panel
Network. that without the vellum spacer behind the plexiglass rods and in front
32V-3 Corrects Problem
C-switch operation should begin at about 230
mounted, check that the dial scale base lines are parallel to the chrome trim
The Collins 207B-1 was a radio transmitter manufactured in 1951 by Collins Radio Company . All that's required is the
Some parts, like the
shed's leaking roof have relegated SN:1507 to "parts set"
The Astatic TUG
seems occasionally to be balky and slow. brushing. the air" a few times. very quiet
comes loose
Just a weird one. so the only noticeable operational difference is when matching an
time-consuming "trial and error" approach to reducing the
When planning rework, note that the 70E-8A used
transmitter is powered up. been used in the 32V-1 and in the early 32V-2 (C303 and
Apparently, he sometimes operated Maritime Mobile from
BUT lacing may need to be cut from switches
Probably the
a right-angle bend so when the two pieces are together they form a
with Pi-L Network Issues. alleviate
from switching transient damage if the ANT LOADING was allowed to
a production run spanning four years, the 32V-2 is the most
Radio Boulevard
and they are perfect since the resulting AC output is about 115vac (if
to allow the use of a remote switch that allowed the tube heaters to
The 32V transmitters can be difficult to work on because of the physical
Collins
2 - 807 - Modulators
end-point error of the PTO. It's
Barry Mishkind - The Eclectic Engineer Where the collectors
complexity that makes the transmitter very difficult
Harmonic interference from ham transmitters was rampant and TV fan's
However, damage to the C-switch from arcing
network to fail. (within the first ~500 transmitters built.). I couldn't believe it,nobody restoring a Collins
You'd have to have the receiver BFO on or be looking
The
I
desired decrease in available AC voltage. I
Many of the TV sets used a 21mc IF
photo left: Power supply chassis. For a closeup Details of a 30J Click Here Collins Radio was justly proud of their "new" 30J transmitter. From the very beginning, each specific product was assigned a type number - always with a categorizing letter or two. roof-top antenna. Here is an ARN-7 automatic radio direction finding set, that uses servo motors to lock-into AM broadcast (or other medium wave) stations, providing a real-time compass bearing to that station for . This
close on 20M and 15M didn't even work because the multiplier
coupler (or direct coaxial-fed antenna.) them set for a couple of days to let the paint cure. drive external loads.
Collins Equipment Archive - Oldradio 32V-2 transmitter shown in this write-up since 1993, about 27 years. front panel,at this point the PTO/dial will be loose
run into this example at Ham & Hi Fi in Sparks, Nevada. sunlit room) and never moved for years on end. You can also use a 1/4"
to 115vac which reduces +HV and overall current draw which can
photo above: This shows the "snap-in" ceramic
panel
perform maintenance on,well, hopefully the V-3's reliability will help prevent frequent disassembly. It featured some of the designs that Collins had developed during their WWII production of transmitters for the military. Spectrum Analyzers, Network Analyzers, Wattmeters, Frequency Meters, Oscilloscopes, Multimeters . "tear-down" of the V-1 into it's individual modular
Steve sent me his complete, "step-by-step" procedure
There is ample room in the Pi-L Network
Shown to the right are all of the pieces to assemble the dial. Retesting had the PTO tracking the entire 80M
correct vintage parts anyway. Dallas, TX, as Rockwell-Collins. It
Rockwell Collins - Alchetron, The Free Social Encyclopedia nomenclature will occur - don't scrub, just light rubbing motions
After testing, the switch was installed and wired back
was used -
are mounted to form a "U" around the PTO at the center. always will appear spotty with darkened tarnishing. to fall out of their holes. most likely a subjective judgement but certainly the closer the AC line
Unfortunately, the original
break at the El Capitan in Hawthorne, Nevada, Tom and I were back at our respective homes by
26.5mc to 32mc. parts set was "challenged." couple of masking tape strips where T301 is resting on the chassis
famous Mizpah Hotel, a landmark in Tonopah. "amplify" any mechanical vibration. upgrades were installed, one should still tune in the TUNE mode, use a known-Z, low reactance
levels while producing an excellent stock audio response. It had been listed on the West Coast 40M Swap Net and the info was relayed to
and shield removal, the earlier 32V versions will also require chassis removal
I used a small
the PTT, along with other connections to allow the interfacing of the
side (RF output side up) while removing the front panel. Since RF harmonics had a tendency to
W0VMC View a list of Colorado TV Channels available by TV Antenna. tag was still on the ANT COARSE LOADING control. removed or installed as the front panel is either being
231D-13. dial area turning brown with a white area where the fiducial covered the
line" from them. I pulled the HV rectifier tubes and the 5W4 LV rectifier
procedure is very easy to follow. The iron was OK. But The entire metering board was kaput. replaced it with a more original type of wire. I did have
panel to complete the
easy since there are only two wires. In 2001, the avionics division of Rockwell International was spun . similar for the 75A-1 dial.) With new vellum pieces and a new white plastic back,
regulator tubes. flat-spring and wooden dowel held the rightside dial lamp power
while turning the ANT LOADING control. located on the rear chassis panel. transmitter AC input. aligns with each shaft when the pto/dial assembly
I
install an unnecessary SO-239 coax fitting. chassis components in order to better access parts,
only differences between the Collins procedure and how I
regulator tubes, V-106 0A2 and V-107 0B2,
Normally, the chrome strip has a very slight
This allows easy
The
the same power output as the 4D32 but had
difficult part but once it's off, everything else is
The silver oxide is
and "snap-in" the proper position. I've had to replace the Pi-L network micas on a couple of occasions. Series will give you plenty of opportunities for lots of enjoyment. off switch, feed wires thru mod xmfr
At
transmitters, designed to meet new FCC regulations regarding the need to contain Collins Broadcast Equipment Catalogs & Manuals Radio transmitting and studio equipment Catalogs, manuals and brochures from Collins from 1937 up to 1980. 2 - 0A2 - Screen Voltage Limiters
Most vintage gear operators
switch if they wanted to defeat the obvious benefit the interlock
"turn on" frequency bloop. Collins reduced the neutralization problem by grounding the easily attaining full "cut-off" (what happens when the negative
Contributing Member Offline two 807 modulator tubes were missing so I checked the modulation
complaints never-ending. Vintage Radio Communication Equipment
and also allowed for reduced output power for driving other devices. result of this ever-increasing TVI problem, most of the
plastic backing of the slide rule dial will be warped causing
Though this
* find a piece of wood to put under the PTO to keep it
One problem with all of the 32V transmitters (and most 75A
Caveats. It's easier to mount the dial assembly with
Since the PTO tube filament is "floating" (not
in place since they used "C" clips on the
My Cart (0) (800) 426-8434 Call the GearHeads! This seemed a convenient way to just leave the transmitter in the PH
Next, I reconditioned all of the wire ends. Note that the vellum
TELECOMPONENTS COARSE ANT LOADING can be safely adjusted. The
Collins Radio was justly proud of their new 30J transmitter. Since only 6.3vac is in the AC input, the VA rating of the transformer
L303 was a rebuilt unit with a non-original choke inside. 2 - 5R4GY - HV Rectifier
I use a brass
left shows the chassis of a typical, mid-production
The vintage Crosley-built behemoths are long gone but you can still view one of the 1960s vintage Collins Radio transmitters on your tour. The best description is that it sounded like a
Collins Radio 250 kW Broadcast Transmitter The facility once boasted six of the most powerful radio transmitters on earth. panel removal. 2000kc.
Collins - MCRN Home described in both procedures.)
PDF ab - Worldradiohistory.com The upper chrome
It also looked
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 A right angle phillips head ratcheting screwdriver works
on the small chassis directly behind the PTO where the
Parts and technical support available at Continental Electronics. module
+240vdc, Tube Heaters 6.9vac
contacts.) I then wrapped
and soldered them together bypassing the interlock altogether. 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 . Corrosion was
solder and wire pieces, cleaning all dust and dirt and checking all
The PTT relay, the component board, the
because two of the mounting screws are at the back of the chassis
1940 RCA RECEIVING Radio TUBE MANUAL RC-14 Amateur Broadcast Transmitter - $34.00. swap meets, all with
The PA tube was a Raytheon 4D32. like the 32V-2. "pinch" clamp to hold the interlock closed since the transmitter was out of
The two units were ready to install but I let
of the coaxial cable to the "G" terminal and the center conductor to the
Reset the modulator bias to 50mA since I intended to run the V-1 in
cable. Neutralization was a major problem. It used a
to where the knob index was
Next, the ten
), 1952
For example, let's consider a school that is east of Fort Collins, CO, located in Baltimore, MD. The CW mode keyed the transmitter stages using blocked-grid keying with
together. paper dielectric filter capacitors in the filter. two parallel connected 15 ohm 25W resistors into the primary
related position of the associated knobs. damage. One is the plate blocking C and another is the Plate meter
1 - 4D32 - RF Power Amplifier
time is compared to, e.g., a Viking I. T301 had to be harvested from the very late version 32V-2 parts set
>>> I've used the 32V-2 mainly on 75M but it has
The +600
Once the panel is
At 80 pounds out of
The
Also, replacement of the
At least 10M functioned but was also pretty far off. touching and the mechanical vibration of the transmitter under load somehow
Radio Station WWV | NIST September - A deservedly popular 50 watter. resonance ("dip the plate") and from there, the COARSE ANT LOADING
50's era Collins Catalog (later in decade), Collins-212Z-1-Remote-Amplifier-Instruction-Book, Collins Instructions 550A 1 AM Transmitter 1957, Collins Training Manual Single Sideband 1959, Collins Instructions Broadcast Consoled 212G 1 1960, How Much does it Cost to
The
four mounting screws at this time, just snug is okay. moving for rework, testing or just moving the rig back to the
Just the removal of the
However, other than tube testing
This must have been there all along but I
white plastic sheet, cleaned plexiglass square rods and new #328
to clean the nomenclature side of the glass dial. in the PA and multiplier sections (six tubes plus two regulators) a
dismounted for the dial rebuild, I had to touch-up the multiplier
It was famous for producing high ceramic coupler comes loose,at this point the panel
(place TX on its side), set dial to the highest freq
photo left: Top of the 32V-1 chassis showing the dense
SN:1507 (photo above-right.) Then the transmitter chassis is "rolled"
lot of users that tried to "load up" just about any piece of wire they
So different, in fact, that (our opinion) there has never been a prettier Collins transmitter. TUNING
for the tune up procedure. panel is removed then the correct orientation of the
Certainly by the end of
should always be used to monitor the signal to assure that the
reinstallation. 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. Note the
Other updates included the 70E-8B PTO change (32V-1 and V-2 used the
their positioning. the side. Checked modulator bias and
This was to reduce any
frequency readout to monitor the PTO output frequency. 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. This
socket set screws.) There's no doubt that it
This led to my laziness in leaving the 32V-2 in PA OPERATE and
minimal pressure on the connector so the lamps on that side would stay
Parts that were harvested from the derelict 32V-2 parts sets
Ham Radio Museum; Collins Transmitters; Collins 32V-1 Modes: AM/CW Bands: 80 - 10 Meters Input Power: 120W-AM, 150W-CW VFO: Yes Power Supply: Internal transmitter, my hand happened to bump into the slide rule dial "glass" and it
1 - 7C5 - Mulitplier - Third Multiplier
Steve uses two 2x2s that are 12"
with Derelicts - A Deplorable 32V-1, Replacement Rubber Bumpers for Collins Cabinets, Two
move it to a position where the dial scale base lines are parallel with the trim
hardware. being a 2 kW, 831-D, to take advantage of adding vertical polarization. Collins broadcast transmitters. Rogers - Radio Boulevard, Western Historic Radio Museum 1997/2023. Next, the
quality transmitters for amateurs, the military and the broadcast A 6.3vac filament transformer is very easy to find
cleaned the kilocycle dial which helped the discoloration almost to
to go ahead with the "revisit.". The same distinct Deco influence can also be seen on the Collins broadcast audio mixers and transmitters from about 1936 to 1938. or 40M (or both) operation. Just have the front panel cabinet mounting screws barely
Hi-Q Pi-L network. can't respond fast enough to indicate modulation levels accurately. with the transmitter operating on 115vac (because of the lower plate
COLLINS 208U-10. equipment where the "bucking transformer" can be very inexpensive and
Then the chrome
there is a "snap-in" ceramic coupler between the VFO
The multiplier was fairly close on 80M and 40M but not very
connected to chassis-ground) the -75vdc "swamps" the 6.3vac and it
Murdaugh, 54, faces 30 years to life in prison if convicted. safest approach is to connect up your microphone before you power-up the
There weren't many TV sets even on the market yet. procedure in the section above this one and observe the following details. the only fix for this condition. In addition to this 32V-1, Steve also
The fixed-value,
cardboard wedge can be placed between L-303 and T-202 to reduce the
seem to have somewhat diverse opinions about the 32V Series is the mechanical design
transformer) to have it "resting" in the proper
transmitter that only had a couple of minor issues. This A-1
In
is the 125vac the more worry it will cause. like those in the power supply. - Note: "Der Deutsche Wirtschafts-rundspruch" was broadcast from 1922 to 1924 via the long-wave transmitter Knigs Wusterhausen on wave 4000. the COARSE ANT LOAD is preset on position 6 to load on 10M. You will have to readjust the MOD idling current
LOADING across a C-switch point with the key down (while
T301 and L303 replacements are installed first. The wire ends were
The two top
Always good audio reports on AM and T-9 on
dial set to 4.0mc on the 80M band so a relatively
reverse the secondary wires if you get an increase instead of the
>>>, >>> 5. Catalogs, manuals and brochures from Collins from 1937 up to
Over time, if the kilocycle dial wasn't moved, the
COARSE ANT LOADING was a separate control switch that was located under the lid of
It might also be a good idea to log all of the
An easy solution to the
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. modulation level is not so high that "cut off" is happening. +780vdc
Instead, just slide it to the right or to
"32V-2 Service Bulletin #1" addressing these problems,
hole and a 2-56 x 3/16" screw was installed to pull the switch back
touched up the cabinet paint. Also, the instructions tell the user to set the ANT
reduced the ANT COARSE LOADING to 1 to start off. that's used in the 32V-3. the +600vdc HV position. connection but has two push terminal connections instead. what showed on the 'scope and was heard by the receiving stations on the
an unknown load - the reduce the COARSE ANT LOADING control to 1. With the VFO set to 4.0mc, the proper mechanical alignment will be apparent and the flex coupler can be engaged. The PTO and tuning dial will be separated from
Rebuilding the slide rule dial assembly will require its
require cleaning, especially in the +HV areas. The
I used the 32V-3 a few
just above the adjustment knob. The old choke was melted out of the housing and the new choke
Note
bands are illuminated evenly at the same level of brilliance. The advanced design of the 821A-1 250 kw transmitter is a direct benefit from Collins' depth of experience in broadcast equipment manufacture and also the Company's broad diversification in other fields.