WITH ORIGINAL BOX ENVELOPE CARTON BOX US ARMY SIGNAL CORPS

VT-25 = 10 = CV603 = 210 UX BASE Triode

Fully Tested emission results on TV7d/U tube tester calibrated

Test results 40 ( reference good is 38 on TV7d/U tube tester calibrated )

These are one of the most musical directly heated triodes in SE configuration in particular with 6SN7 > 10Y/VT25

Originally intended FOR RADIO TRANSMITTER of the model BC-191 FOR US ARMY or vehicular use with JEEP WILLIS during WW2 second world war of Allied Army U.S.A. BC191 is an HF transmitter of Year 1942, AM/CW, 200 kHz to 12.5 MHz in several bands, according to the tuning unit plugged into. For frequency details see the entries of each tuning unit: TU-5, TU-6, TU-7, TU-8, TU-9, TU-10, TU-22, TU-26. 50 to 75W, depending upon the frequency band. The BC-191 was intended for vehicular use, with external dynamotor. Part of SCR-177, SCR-187, SCR-188 and SCR-193. >br> Several models built by different manufacturers

Also employed in Radio Receiver & Transmitter Type BC-151 Part of SCR-131 When packed for transportation the SCR-131 set consisted of four parts:

1) The radio receiver and transmitter (BC-148 and BC-151), with a carrying strap ST-19. When assembled with the required batteries, headsets and tubes the set weighed 33.5 pounds and was 14 15/16 inches high, 14 ½ inches wide, and 8 ¼ inches deep.

2) The bag BG-49, which contained the LP-7 loop antenna, 3 legs and 2 cranks for use on the generator GN-35. The bag weighed 9 pounds.

3) A case CS-41, which contained a generator GN-35 and weighed 22 pounds. 4) A bag BG-50, which weighed 12 pounds and contained 3 spare batteries BA-23, two spare batteries BA-2, 2 spare tubes VT-25, 3 spare tubes VT-24, 1 cord CD-103, message books and a few more items.

The total weight of this bag was 76.5 pounds. When set up for operation, the set consisted of two essential parts: the radio received and transmitter, with the loop antenna attached, and the generator. The cord connected the generator to the set. The loop was 57 ¾ inches above the level of the ground or other item on which the set rested.

Vt25 / 10Y was employed aslo on Transmitter BC-375 HF transmitter, AM/CW, 200 kHz to 12.5 MHz in several bands, according to the tuning unit plugged into. For frequency details see the entries of each tuning unit: TU-5, TU-6, TU-7, TU-8, TU-9, TU-10, TU-22, TU-26. 50 to 75W, depending upon the frequency band. Required the PE-73 dynamotor for HV supply. 28V version of BC-191. The BC-375-(*) was generally used with its companion receiver BC-348 in several airplanes, such as B-17, B-24, B-25 and B-26. Part of SCR-287.

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BOX 49