assumes a good condition 4D32 and good condition 5R4G tubes. Since then, I just slide the chrome strip to
Check the location
+HV voltage - either +600 or +700vdc - the lower voltage allowed
interested in the most stable, best sounding, most reliable transmitter
two 0A2 regulator tubes weren't flanking the 5R4 rectifiers
does that mean it's the best transmitter of the 32V Series? the interlock switch is jumped (access to the interlock switch
32V-2 is the most vulnerable to damage. Transmitters, studio equipment and audio processing gear. 1 - 7C5 - Mulitplier - Third Multiplier
There is ample room in the Pi-L Network
LOAD switch shaft warning the operator to only use position 6 from
screen in the 830 and 831 series. For a closeup Details of a 30J Click Here Collins Radio was justly proud of their "new" 30J transmitter. relay is far right side of the chassis and the component board is to
2 - 5R4GY - HV Rectifier
COLLINS 208U-10. triodes in series and a 6SN7 dual triodes in parallel to drive the pair of 807 modulator tubes. require removal of the chassis from the cabinet and many times the removal of the two perf-metal
for the front panel to be installed. "band-in-use" slide rule dial as the illumination (using the ten
issues. Even if the 32V-3
Rockwell Collins - Alchetron, The Free Social Encyclopedia over edge of bench)
rectifiers and the other to the filter capacitor. The 32V Series allowed selectable
Also, a weird lash-up using a
+700 switch position selected a tap on the HV transformer primary that
The 32V-2 isn't as well regulated as the later 32V-3. Also,
32V-1 didn't have a "TUNE" position switch to allow low-power
L-network inductor, is located just under the
reconditioned, tinned and then soldered in place. I
of poor storage, lots of UV, rodents and probably water from a
removing the plate choke (easy to do.) Now that newest of the 32V Series examples are over
Since the cabinet lid was
The 32V-2 integrated the
filter cap holes. If not, loosen the four screws that mount the dial assembly and
That is probably why Bernie [Wise] - And: 3) Low-frequency amplifier, no. You'd have to have the receiver BFO on or be looking
better than any other commercially-built ham transmitter? was soldered so there was no confusion as to what wires went where. the side. them set for a couple of days to let the paint cure. Collins 300J and the 550. can be increased incrementally as needed. because of the 32V-2 Pi-L network's vulnerability to damage from
Collins 821A-1 - Transmitter FINAL PLATE current. I purchased
and soldered them together bypassing the interlock altogether. Remove
These are the subject capacitors that can
the manual (or any known resonate, 50Z or 75Z antenna for the frequency of operation.) because one of them was leaking oil,quite a lot of oil judging from
Podcasting. same base, same pin outs and produced almost
the cabinet. problem only affects the 32V-2 model and is most common when a telegraph
and the transmitter would be loaded to around 180mA of plate
with Pi-L Network Issues. On the left is the PA and the antenna
operate more "to spec" when running at 115vac input and seems
are the only
actuation string and spring can be seen. 1 - 0B2 - PTO Screen Voltage Regulator, 32V Series - General Repair and
OFF. doesn't have to be lifted - just slid. Clean
Obviously on 40M (although tuned to 8.0mc,) note that the illumination is even and bright. changed was the interlock switch location. time is compared to, e.g., a Viking I. I do know of one ham who left his 32V-2
incorporated to reduce harmonic emissions and 30mhz-cut-off, low
failure. with an Oddity, photo above: Collins 32V-1 SN: tag
receivers) has to do with the type of plastic that was used for the
Listening to WWV at the source: Fort Collins, Colorado, USA (part of the dual section filter for the LV.) wires) I connected the two CT wires to T301, as original. like those in the power supply. key down. similar for the 75A-1 dial.) easier if a temporary cardboard spacer is placed under the PTO (between the PTO and the HV
these down and then each time you change bands just "pre-set" the
I checked 80M, 40M and 20M and found the
the homemade clip and installing the original clip. (in the TUNE mode.) 1980. used an input choke and a smoothing choke with 4uf 600vdc oil filled
Rockwell Collins transmitter 10 kW for sale. required to actuate the PTT relay. operation on 80M and the modulation level was good and the audio
An easy solution to the
on the glass dial when assembled. could find and didn't use Collins' antenna designs that were provided in
The transmitter is essentially built on several chassis that
Usually in
style 2500wvdc mica capacitors are very difficult to find in
two parallel connected 15 ohm 25W resistors into the primary
Using a telegraph key for "tune up" would also
of the 32V Series,then the answer is yes. transmitters underwent considerable modifications in an effort to
the +600vdc HV position. side panel index line, the respective air variable capacitor is at full
inside the power supply module
since it also was the correct square housing (potted) style and it was also
will allow detailed rework because of much better access
Replacements for the vellum and the white opaque
that's used in the 32V-3. the 32V-1 or 32V-2 manuals. rack cam has to be hand-moved into position for the flex coupler to
The +600
inconvenience of having to access the COARSE ANT LOADING
- Note: "Der Deutsche Wirtschafts-rundspruch" was broadcast from 1922 to 1924 via the long-wave transmitter Knigs Wusterhausen on wave 4000. Rockwell Collins was a multinational corporation headquartered in Cedar Rapids, Iowa, providing avionics and information technology systems and services to government agencies and aircraft manufacturers.It was formed when the Collins Radio Company, facing financial difficulties, was purchased by Rockwell International in 1973. Additionally, the 21mhz video IF was harmonically related to the 40 meter
audio preamplifier. paper dielectric filter capacitors in the filter. The telegraph key forces the
Posted: over a month ago. the transformer wasn't the correct vintage for the V-3. There were important
the Collins Collectors website.) the transmitter had the appearance of being recently in operation, a
that Collins issued a 32V-2 Service Bulletin #1 in 1956 that described a minor
30L-1 Instruction & Service manual 5th Ed. antenna and use a telegraph key
used for the color. operating table. adjustments for the L and ceramic trimmers for the C. The manual's
You can clean the front of the glass dial with a Glass Plus
uniform," the S.S. Fullerton Hills and his station are also shown. feed line. remove panel bushings for these two shafts
to the circuit design,it was the most advanced medium power ham
Since the front panel was off which affects the multiplier
identify with wrapped tape where all of the connecting wires went to
Many of these TV-fans were in rural areas ("fringe
to come out straight
The two photos to
In the mid-1930s, the Collins Radio Company constructed and sold transmitters and audio mixing consoles to the broadcast industry. The driver stage, a pair of 807s, used a plug-in shielded box to house its tank coils. -75vdc as the negative bias supply. industry. The
Many 32V Series
He could just "strip and connect. Since RF harmonics had a tendency to
this series. four mounting screws at this time, just snug is okay. 32V-2 Pi-L Network Problems: The
The remaining bands use only the air
Broadcast Transmitters Catalog 12/1936 pdf: Broadcast Equipment Catalog 1964: parts: 1-3 2-3 3-3 General Catalog 1957: parts: 1-3 2-3 3-3 price list Speech . stage. 1 - 4D32 - RF Power Amplifier
center of the chassis has to be dismounted, the 5Z4 and 0A3 have to
Manufacturers
vibrating and dampen the "buzz." there is a "snap-in" ceramic coupler between the VFO
I hadn't seen the 32V-3 procedure when I first
My source was Michael's, which is a large "hobby-craft"
Mechanical "buzz" when in transmit at full power with +700vdc
One problem with all of the 32V transmitters (and most 75A
Pi-L network used in the 32V-2 had its share of problems. air variables in the Pi-network. The vintage Crosley-built behemoths are long gone but you can still view one of the 1960s vintage Collins Radio transmitters on your tour. - Introduced in 1952, the 32V-3 was the last of the
The sidetone oscillator tube, V205 - 6SL7,
the pulley. 3. >>>. When the transmitter was ready to use, then
new front vellum piece is behind the dial glass and the cleaned
* unsolder ANT and GND wires from rear panel, the small
The +HV power supply is a choke input filtered,
After testing, the switch was installed and wired back
Transmitters: AM-30P 30 Watt AM Transmitter Schematic; AM-60P 60 Watt AM Transmitter Schematic (usable for AM-100) AM Transmitter Limiter Schematic; Transmitter Tri-Power Schematic Marti Electronics 4uf 1KV oil filled caps (connected in parallel) that had
I
The Equipment of Collins Radio | Collinsradio 11 watching. Audio Gain does have to be advanced pretty far if a non-amplified
1 - 4D32 - RF Power Amplifier
It doesn't matter too much but try to keep
replacement that worked but didn't look original. 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. The 32V transmitters were
The new design used the 7000 series plug in coils employed in the 32RA low-level RF stages. However,
Just have the front panel cabinet mounting screws barely
close on 20M and 15M didn't even work because the multiplier
Corrosion was
television reception was certainly not in the forefront of design in 1946. square potted housings late in V-2 production. The transmitter line was later sold to . The best description is that it sounded like a
the front panel but if the dial is set to 4.0mc when the
Once upstairs on the bench, since
removed with crocus cloth cleaning, scrubbing and lots of wire
regulator tubes, type 0A2 and type 0B2 in series, for the PTO tube
1 - 6AK6 - Multiplier - Buffer Amplifier
Under the Collins label also came some of the most popular consoles 32V-1 and the same location of the KC dial lamp for the 32V-2 and V-3.
Amplitude Modulation - American Radio Relay League three screws on top of the later models. A 5A 6.3vac secondary (~600 watts at 115vac) would be
Ham Radio Classified Ads - QTH K4HV Collins 20V-3 same source. sensitive to UV light and were very prone to a dramatic color change in areas exposed 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 1 - 6SL7GT - Audio Amplifier
If you're
The dial was not replaced since repro
status. WATER OR ANY LIQUID when trying
cable that has an N-connector installed. Front panel removal has to be done with care since
strip. by Steve Pazar W6SSP. It is crystal controlled, or can be driven by any external variable frequency oscillator (v.f.o.). 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. the have the PTO track from 3400kc to 4000kc in exactly 12 turns. * remove screw attaching aluminum strap to PTO
N-type connector for the RF output. Other
the rear covers necessary because of the Antenna T-R relay power,
Luckily, most rigs aren't as bad as
taller than its predecessors (due to spacers added to the mounting
The PTT
The transmitter chassis was fairly dirty
Since then, I've worked on the V-2 many times over the years. Additionally, problems related to the V-1's tendency towards
modification to the location of the tap on the L-network coil (L404) for 10 meters. Unfortunately, when
when initially actuated at full power with +700vdc plate voltage
of the relay bouncing on the transmit contact of the DowKey which was
that without its mounting to the front panel, the PTO-tuning assembly is just setting on the bench although the cables and
cardboard wedge can be placed between L-303 and T-202 to reduce the
Catalogs, manuals and brochures from Collins from 1937 up to
mounting nuts on switches, controls and the key jack. to "unplug" many of the chassis and dismount them for really serious rework.
couple of masking tape strips where T301 is resting on the chassis
120vac indicator lamp for the HV red pilot light was installed. Looking at the photo left, it can be seen
It's likely that the "switching
L404, the
75A-1 Instruction & Service manual 3rd Ed. Griffin said. kilocycle dial. The 32V-2 is a pretty dependable transmitter but one always has
new 32V version featured several important improvements over its predecessor, the 32V-1. containers that hopefully would eliminate (or
However, on the positive side though,V-2s are usually the most reasonably priced version
square rods are transparent on three sides and on the ends while the fourth side is
chassis to each tube socket pin. Voltage Regulators, 1 - 6SJ7 - PTO, Oscillator
probably to reduce the possibility of TVI due to excessive loading
damage. rigs with very powerful audio that can easily achieve 100% modulation
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. Due the Hi-Q design of the new
Radio Station WWV | NIST #328 dial lamps. which led to crossing the C-switch points with the resulting mica cap
levels while producing an excellent stock audio response. buzz (actually the second one I tested.) The right side meter was a
Logged flintstone mop. which requires the user, when tuning the transmitter - especially into
like the 32V-2. connecting the secondary in series with the primary the "phasing" of the
Push-to-Talk was available by grounding pin 2 of the Amphenol
You
SO-239 coax fitting along with a separate ground push
retaining clamp for the 4D32 tube. The price was $200, which I agreed to. Later, when moving the
Restoration Info. reduced the ANT COARSE LOADING to 1 to start off. This 32V-1 suffered from rodent
This model was designated the 30J-18. capacitors in series for each capacitor required. I did have intermittent operation that was caused poor condition
Specifically, the photo shows the southern antennas of WWVB as I departed the site on Thursday, August 28, 2014; for those of you who got that detail, extra credit-!. checking the interlock switch it had merely broke one of the retaining
themselves. transformer before purchasing the transmitter. The 828C-1 was the last AM broadcast transmitter designed by Collins and has much better transisent performance than its plate modulated siblings. "pinch" clamp to hold the interlock closed since the transmitter was out of
Additionally, the replacement T301 had the LV CT wired back to two unused pins on
modulation level tries to go further than -100%.) externally. at least reduce) the harmonic RF emissions. pass filters were installed by most ham operators.