[Hallicrafters] Hallicrafters HT-11 "Ensign"

[Roger Basford]

Hi All,

Haven't been on the list for a while due to other radios taking up my 
time. I've just made a start on restoring an HT-11B marine 
radiotelephone and am looking for some info on a modification that my 
radio has. This is a added 6SN7GT octal valve under the chassis, with 
what appear to be "period" components attached to the base, with some 
wiring brought out to a standard jack socket on the side of the radio. 
The 6SN7 base is mounted on two stand-off pillars. Oddly the jack isn't 
accessible when the radio is in its cabinet, unlike the PA cathode 
current jack under the tuning chart. I'm guessing that this is a field 
mod by the USN, as the radio is badged as part of the MT-2 radio 
telephone system, with a date in service of 1944, but what is for I've 
no idea. I have a reprint handbook, but it's for the D and E models and 
shows nothing about a 6SN7GT. I was wondering if it is some form of 
noise-limiter but normally that would be a double diode, like a 6H6.

Any info or ideas appreciated!

73

Roger/G3VKM - Norfolk, England.