Crusty old Joe's

Kodiak Alaska Military History

The official web site of the Kodiak Military History Museum

Museum Radios and Electronics Collection

TDD-3 Transmitter

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.

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Curt and John removing the TDD-3 from building 456.

BC-728 Receiver
This receiver was purchased on eBay in late 1999. It is a very fine condition example of the two receivers as used in Kodiak and listed in exhibit 3G. It is also known as SCR-593 with a stock number 2S593. This could be interpreted to be a primitive pager.

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
      AN-75A antenna
      BB-54A 2 volt wet cell battery
      TM-859 manual

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BC-923A Receiver

This example was purchased on eBay. As shown on the annex exhibit 15B, the SCR-808 radio set was in each of the six spotting and plotting rooms. Every base end station had a SCR-828 (two receiver version). These were for communications in addition to the telephone. Exhibit 3G shows six SCR-808 and twenty SCR-828.

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.

Radio Set, 27-39 Mhz, FM, 1 rx version of SCR-808; TM 11-601, 1945

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BC-221-AH frequency meter
This example was purchased from eBay. It is fully functional. These were used at most radio installations that had high-frequency radios. They are shown in many pictures of WWII radio installations. One is listed in the Kodiak annex exhibit 3G.

Quite a bit more information on this meter is available on MILLIST.

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BC-312 Receiver
This receiver or the identical appearing BC-342 is shown at the Spruce Cape WWII radio station on the extreme left of the photo.

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.

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S-20R Hallicrafters Receiver

This is shown in the Spruce Cape WWII radio station picture from the Underwood Album.

Quite a lot of information on this 1939 model receiver is available here.

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HQ-120X Hammarlund Receiver

Search for HQ-120X on Google.

EE-91 Telephone

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.
SCHEMATIC hand drawn from original in phone lid.

EE-8 Field Telephone

We have more and they will be added here.

Technical manuals and books
in the museum collection

* (Note: If largest photo version doesn't load, it may be only available on our CD-ROM of the website.)

Main index This page updated 2002 June 8