Crusty old Joe's
Kodiak Alaska Military History
The official web site of the Kodiak Military History Museum
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TDD-3 Transmitter
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Fifteen watts on 200-550 Kc. The first picture is before restoration. It was found, still installed in it's original location, in building 456 on the Kodiak State Airport (the old Kodiak Naval Base) just prior to the demolition of the building in 1999. It was spared primarily because the building was in a secured area within the airport perimeter fence. It was in an upstairs room in the old concrete hangar. It was a mass of rust. After complete disassembly, the metal work was refinished by Laine Wilde. The electronic components required individual glass-bead blasting and refinishing. The front panel was bent in the upper right corner. It is about a quarter-inch thick steel. Layne and Chris Kinter straightened it out.
At some time in it's history, the right meter was replaced. It still doesn't work. The other meters are apparently original and they all work. We purchased a manual, dated 1945, from Lee Frank in Pennsylvania. There is no date on the transmitter itself.
It uses a pair of 807's in parallel in the final modulated by a pair of 6L6's. One of the 807's was missing but it works without it. Other tubes include a couple of 6V6's for oscillator and audio preamp, a voltage regulator and two rectifiers.
The crystal is missing. It was about three and a quarter inches in diameter, in a ceramic case with fuse-like ears on each side. There are two fuse clips for the crystal on the chassis visible in photo two in the blank area of the chassis.
We have operated it with an external VFO and it puts out power into a dummy load. The replacement RF ammeter is open. We also found two open RF chokes. All other components are as we found it in building 456 including the tubes. All the tubes test weak on our tube tester but they work a little.
Restoration was done by Joe Stevens with the support of Aksala Electronics and Curt Law.
SCR-593
Receiver, Warning-Network (BC-728), four channels,
2-6 Mhz, powered by 2-V battery; TM 11-859, 1943.
General Purpose. Pack and vehicular; rec only; AM;
freq range 2.0-6.0 mc; voice and tone only, 455 kc IF.
Four preset channels; pushbutton control, 7 tubes CD-618, FT-338
Uses storage Battery BB-54; requires 1.85 amp at 2 v DC.
Uses 7 ft telescoping whip ant, AN-75A.
Used by AAA for reception of alert or warning signals.
BC-728 Receiver, 2-6 MHz, 4 push-button channels, P/O SCR-593
CD-618 12 volt charging cord
FT-338 mounting bracket
MC-649
AN-75A antenna
BB-54A 2 volt wet cell battery
TM-859 manual
SCR-808
Radio, Vehicular, 27-39 Mhz FM, last version of SCR-508 (BC-605, two
BC-923, -924); TM 11-601, 1945. Vehicular set; FM; freq range
27.0-38.0 mc; 120 channels 100 kc apart; voice only; transmission
range 15 miles stationary, 10 miles, moving. Xmtr rated output 2 w
low, 35 w high. Mo, xtal calibrate; 4 preset channels. Power
supplied by 12 v vehicular batt; power requirements 40 amp at 12 v;
dyn are integral w/rec and xmtr. Uses whip ant. May be converted to
24 v operation by substituting Dynamotor DM-66 for Dynamotor DM-64
for rec and substituting Dynamotor DM-47 for Dynamotor DM-65 for
xmtr.
SCR-828
Radio Set, 27-39 Mhz, FM, 1 rx version of SCR-808; TM 11-601, 1945
Quite a bit more information on this meter is available on MILLIST.
It covers 1.5 to 18 Megacycles/second and operates on 24 volts DC with an IF of 470KHz, a crystal filter and 9 tubes. The identical appearing BC-342 runs on 115 vac. More info and a schematic of the BC-312 is at MILLIST and also the BC-342.
Quite a lot of information on this 1939 model receiver is available here.
HQ-120X Hammarlund Receiver
The EE-91 is a wall mounted metal telephone box.
It is a common battery phone which means transmitter
current is obtained from the central office battery.
It is equipped with a single gong ringer.
It has a hand generator for signalling magneto lines.
It has an antisidetone circuit.
It uses a handset TS-12 but it isn't part of EE-91.
When the EE-91 is mounted in a wooden box for outdoor use it's called the EE-92.
When the EE-91 is mounted in a metal box for outdoor use it's called the EE-93.
In TM 11-2052 (on the BD-95 and BD-105 switchboards)
on page 2 a EE-91 is shown in Fig. 2 as the operator's
telephone. Listed for use with the EE-91 are: HS-17-A
head and chest set, TD-2 chest set, HS-30 headset.
On page 5 in Fig. 5, a EE-91 is shown with a TS-12() handset.
Schematics of the EE-91 are on pages 40 and 41.
Inside of phone, magneto is mounted on bottom lid.
EE-91 Telephone
SCHEMATIC hand drawn from original in phone lid.
Technical manuals and books
in the museum collection
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(Note: If largest photo version doesn't load, it may be only available
on our CD-ROM of the website.)
http://www.kadiak.org/radios/index.html This page updated 2002 June 8
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