Signal Corps U.S. Army Radio Receiver and Transmitter BC-611-F Ser. No. 32458 10531-PHILA-45-01 Galvin Mfg. Corporation Chicago Illinois
I have one radio. Since I don't have a 103 volt battery, I don't know if it works or not. It is very clean inside. May 21 1945 is marked inside. It's on 4840 KC and has the following tubes: 3S4, 1R5, 1T4, 1S5, 3S4. Our museum has four of them. So far I haven't had time to get any of them working. All the IF transformers have open windings.
It uses a BA-37 battery or with an adapter it can use a BA-30 for the 1.5 volt filaments.. HV is supposed to be 103.5 volts using a BA-38 battery. Somebody in Italy makes a nice little solid state module to use a "D" cell to generate the high voltage. Brooke has some good power supply info.
I remember working on these when I worked for the Norfolk Naval Shipyard around 1966 or so.
BC-611* Transceiver, handie-talkie, 3.5-6 MHz P/O SCR-526; TM 11-235. Also see BC-721
SCR-536/BC-611 Freq range: 3.5-6 Mhz AM, 40 KHz channel spacing 1 channel crystal controlled Transmit power 36 mw receive sensitivity 3 to 5 microvolts internal AN-190 antenna internal handset with jacks for external hi Z mic/spkr [note: the jacks are connected to the grid and plates of the audio tubes.] batteries BA-37/38 special test fixture IX-17 Mfg Galvin 1942+ manual 11-235, 11-4019 SCR-585/BC-721 is adaptation for gliders, AN 08-10-106, T.O. 08-16-186 replaced SCR-511, replaced by PRC-6