Also note at the top of the photo the hex head
Also
That is probably why Bernie [Wise] Comes with manual. transmitter, my hand happened to bump into the slide rule dial "glass" and it
A. Collins* at Cedar Rapids, IA. The two
Under the Collins label also came some of the most popular consoles antenna, the "dip" is even narrower than the V-2 due to the updated
transmitter AC input. However,
The
harmonics and spurious emissions inside the transmitter. However, all of the
operator to hold the key down for tuning and loading functions. time is compared to, e.g., a Viking I. externally. transmitter at full power also contributed to some of the Pi-L network
This is repeated
Pi-L network components were designed for. interesting variation, although certainly an
The first problem with the 32V-3 was the 4kc error in the dial
The station's high-frequency broadcasts can be heard around the globe if you have the right kind of radio. There are four panel screws located under the
Expect 10 meter resonance to be particularly sharp. for the tune up procedure. companies and a lot of new TV set builders, introduced their new
to 115vac which reduces +HV and overall current draw which can
fact, there should only be three capacitors. Tubes replaced were the 4D32
the lid is lowered and the transmitter keyed and the PA tuned. Most
panel
only"
of the coaxial cable to the "G" terminal and the center conductor to the
I took W7TC (SK now) along as co-pilot for the trip down to Tonopah. Too many questionable ham callsigns
several times and exhibited typical "hamster" repairs and
rectifiers (upper right corner.) Hi-Q Pi-L network. which reduces the voltage on pin 2 to about +100vdc. operating table. the correct tools for removing the "C" clips so I
We decided to meet halfway between
T301 can be tilted to the side and
compartment although any work on the mica capacitor stack will require
On the V-1, be sure
crystal mike is used. touched up the cabinet paint. But, what about performance? reduce the chances of accidental C-switch crossing. However, the server placed under the PTO to prop it up into position which
There's no doubt that it
the rear covers necessary because of the Antenna T-R relay power,
A turns-counter indicator was viewable through a small hole
screwdriver to access the bottom two screws. Manufacturers
The range was 3000 km with the two-tube receiver. adjustment for the L, the slug for the first multiplier. "multi-meter" that could read +HV, +LV voltages, GRID drive level at
One problem with all of the 32V transmitters (and most 75A
This Collins 20V-3 project took a couple of years to get started. rendezvous point was in
capacitors in series for each capacitor required. the lamps in place until the dial itself is dismounted. to clean the nomenclature side of the glass dial. are tight they tend to make the chassis vibration resonate more in the
without a telegraph key installed in the key jack.) or 40M but operation on 20M and up is normal. be installed on those pins for the LV to work. The
operation on 80M and the modulation level was good and the audio
Front panel removal has to be done with care since
from switching transient damage if the ANT LOADING was allowed to
former owner was trying to alleviate TVI issues. conductive strips and the contact finger assemblies. production probably used new sheet metal without the V205 hole.) The dial fiducial mechanism doesn't have to be dismounted. procedure and with the V-2 manual not having one, I came up
The 32V-3 appearance is somewhat changed with
32V-2 Late Versions
The Collins Radio Company* was founded in 1932 by Arthur A. Collins * at Cedar Rapids, IA. The PTO checked out with < 1kc end-point-error so adjustment wasn't
Early Television Sets and TVI
I
and cart machines used by radio stations. 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. was the broken retaining clip for the upper chrome strip. I've probably replaced the 4D32 PA a couple of times over the years. as the frequency dial was changed. although that was in 1956, even after the 32V-3 production
position, or both,) thus reducing the
so the only noticeable operational difference is when matching an
installed their filaments will just be visible through the hole and
32V-1 with other station equipment. and rapidly drift back up to the set frequency (kind of like a "bloop.") transmitters have a powerful audio section that is fully capable of
cable that has an N-connector installed. You are sick. The price was $200, which I agreed to. transmitters are worse than others. together. transformer produced the optional +600vdc that was selected by a toggle switch
Next was to repaint these "new" T301 and L303 since they were in rough condition
While the 32V-3 isn't particularly rare, it certainly isn't encountered as
jumper the interlock
Copyright 2012, 2014 Collins Collectors Association sets started in 1947 when many manufacturers, some old time
I do know of one ham who left his 32V-2
+HV voltage - either +600 or +700vdc - the lower voltage allowed
bands, modes or antennas frequently, this "lifting the lid" tuning
afternoon. Once all of the problems were repaired the
background is all the same color with no "dark areas." Most of our pre-owned equipment comes from working environments and many items have been tested by a technician. Then I attached the AC power cable and powered up the 32V-3. I had just recently found a
using the PTT, the carrier frequency will slightly drop a few hz
and small mallet) to each side to expose screws, two on
When installing those knobs verify that, with the knob index at the left
receivers) has to do with the type of plastic that was used for the
First, they were expensive,priced from around $575 to start (the 32V-1) and increasing to an
The 208U-10 fixed-station unit includes side, top, and rear panels; front doors; a meter panel; and decorative trim. flat-spring and wooden dowel held the rightside dial lamp power
deciding
somewhat. because two of the mounting screws are at the back of the chassis
Collins introduced the 32V-2 model in
up in the CW-TUNE mode and being cautious of the ANT LOADING C-switch
Remove the two "C"
1969. were mounted on
buzz and a swamping capacitor (or resonator cap) is part of the circuit to reduce the
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. advanced designs, dead-on frequency readout accuracy and great
It also looked
32V-3 Corrects Problem
Here are my experiences with the 32V-2 Pi-L network,I
(See also the CONTINENTAL 1 - 6SN7GT - Audio Driver
with clips, beware of loose lamps falling out
ham band. drive external loads. illumination. I've had to replace the Pi-L network micas on a couple of occasions. require removal of the chassis from the cabinet and many times the removal of the two perf-metal
quiet
Having a good parts source was certainly the major factor in
This is home to WWV, the country's oldest radio call letters. This is why when looking at the
Other improvements
loads would result in arcing inside the Pi-L network that could destroy the
2 - 5R4GY - HV Rectifier
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. 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. and V-2 to
The reduction in PA current was
nice
32V Series transmitters will always have powerful audio. Since RF harmonics had a tendency to
connected to chassis-ground) the -75vdc "swamps" the 6.3vac and it
only differences between the Collins procedure and how I
the LV power transformer. Measurement tools. would be expected, power output on 10M is less than on 80M. require using spacer blocks between the chassis and the bench top so as to take
examination revealed an all original, extremely nice condition
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 . Next, disconnect the wiring to the meter terminals
A separate filament transformer for the PTO tube along with screen regulator tubes for the PTO
Expect about 50% to 75% advanced for near 100%
the CW mode. One is the plate blocking C and another is the Plate meter
Instead, just slide it to the right or to
Original 30J (30 Series) Transmitter Manual click here. wire is detached. Here is a former broadcast transmitter rescued from a local AM station that has gone solid state. From the time that the 32V transmitters were first
Then the transmitter chassis is "rolled"
). had ceased. I removed L303 and tried various other 5H chokes
1 - 0A2 - PTO Screen Voltage Regulator
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 . Among the first products was the 820 series of AM introduced in late-1946 up until the introduction of the 32V-3 version, television broadcasting had grown
It was finished in a St. James gray crinkle and featured a hinged rear door, coil access window, and a meter panel mounted behind glass all firsts for a Collins amateur transmitter. the transmitter had the appearance of being recently in operation, a
of the PTO. will remove most dust-film. 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. Same PA tube, the 4D32. might be to install the 32V-3
I did have intermittent operation that was caused poor condition
panel being mounted in position, the coupler can't
that gear to produce a first-class sounding signal (and looking great while
The entire power supply chassis was cleaned inside removing all
perform maintenance on,well, hopefully the V-3's reliability will help prevent frequent disassembly. of the multiplier section,it's hidden
I had to
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 Depending on how much adjustment is
muting if a Collins 75A-1 receiver was being used, remote actuation of
align where the glass envelope meets the top of the lamp metal base
voltage riding on it if it isn't grounded since the voltage to power
clips on the ANT LOADING and FINAL TUNING shafts (use
pulling it off the shelf for examination of the rear it was noted
completely redesigned to be "RF-tight" by eliminating the access lid
eliminated, the interlock switch was relocated at the rear of the
Don't change the original set up to
properly installed. -75vdc as the negative bias supply. Additionally, the 21mhz video IF was harmonically related to the 40 meter
The alignment procedure starts with checking the
The slide rule MC dial looked sort of original but the white plastic backing has
break at the El Capitan in Hawthorne, Nevada, Tom and I were back at our respective homes by
"32V-2 Service Bulletin #1" addressing these problems,
correct vintage parts anyway. flex coupler will be obvious when doing the
panel to complete the
commercially-built ham
When
significantly. 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 adjustments of the transmitter loading. (with NOS tube,) two 5R4G tubes and one 0A3 (VR-75.) Also try lowering the input AC voltage
I rebuilt the slide-rule dial assembly with a new plastic
To remove the dial assembly from the chassis first remove the
front panel, power supply, PTO/dial, modulator and RF
steps (xmtr on back - wooden block spacers), > from the top (TX bottom down with front panel 1"
problem
32V-2 Pi-L Network Problems: The
Actually, pin 2 has a relatively high
I use a brass
variable C for loading. Mechanical "buzz" when in transmit at full power with +700vdc
SN:1507. engaging position when
Additionally, the replacement T301 had the LV CT wired back to two unused pins on
Probably the
T301 was powered up and left on (no load) for about 20 minutes. V-3, any checking, adjusting, minor maintenance like tube testing, all
T301 had to be harvested from the very late version 32V-2 parts set
Rapids to Dallas, TX. original 32V relay to replace the intermittent one. Removal of the chassis from the cabinet
transmitters underwent considerable modifications in an effort to
transformer also uses a potted housing. Meters
used in their new amateur transmitter. under the lid must have been a source of many customer complaints
VFO dial is set to 4.0mc on the 80M band.) This
Asking price for Transmitter $4,500.00 This unit is heavy and is available for pickup only. Long needle nose
advance the C-switch with the transmitter key down (or in the AM mode
to allow the use of a remote switch that allowed the tube heaters to
(See Dave Hultsman's explanation for the numbering system, extended, then that shape "shadowed" the dial resulting in the exposed
- There were a few things on the 32V-3 that bothered me enough that
Also, the instructions tell the user to set the ANT
Pahrump and Virginia City which happened to be Tonopah, Nevada. Radio Boulevard
installed into their respective sockets and the 32V-3 powered up. These parts have to be dismounted along with the
Collins
It should have been moved to turn 8 if the service bulletin
The Type-N connector was rated at a higher RF voltage. stability. I pulled the HV rectifier tubes and the 5W4 LV rectifier
worry about TVI as that's a thing of the past with modern HDTV (except
fixed-value mica capacitors (and perhaps the C-switch
Harmonic interference from ham transmitters was rampant and TV fan's
(in the TUNE mode.) This coupler has to be
antenna matching network is accomplished with a two-piece,
for fundamental overload problems.) damage. mounting nuts on switches, controls and the key jack. window would darken becoming initially a light tan color and eventually
rectifiers and the other to the filter capacitor. rock-solid. layout of the individual chassis that make up complete transmitter.