[ARC5] 6SS7

[john rose]

In the late to mid 1950's a series of tubes was designed and sold specifically for car radios and ran 12 volts on the plate and heater. At last. Silence! The vibrator was gone! This prompted one wag in the ham magazines at the time to write an article along the line "What? You had to develop a special tube to run with 12v B+? Any tube will run with 12v if you.......". So yes, it is possible the Detrola ran on 12v.
The R-392 (the lightweight, portable (yeah, right. 52#) version of the R-390 not A) has tubes that run 24v on all plates. There are a lot of 26v heater tubes in that set, the rest 12v in series.

> From: releazer at earthlink.net
> To: arc5 at mailman.qth.net
> Date: Wed, 6 Feb 2013 10:56:49 -0500
> Subject: [ARC5] 6SS7
> 
> Makes me wonder if the 438 originally was designed for 12VDC for civilian applications. I wonder if that would work. I have run my ARC R-511 on 28VDC on both B+ and filaments, but have not heard of sets going lower than that. 
> 
> 
> ______________________________________________________________
> ARC5 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/arc5
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:ARC5 at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html