Use of RCA 237 Tubes in Radio with AC Powered Filiments

Thread Rating:

Phlogiston
Radio-Fixer-Upper

Posts: 2,118
Threads: 112
Joined: Jun 2010
City: Medford OR (OR what?)

06-20-2015, 12:46 AM

Here are excerpts from the early RCA tube manual. It looks like they were trying to sell the DC filament feature.

"I just might turn into smoke, but I feel fine"
http://www.russoldradios.com/

« Next Oldest | Next Newest »

Messages In This Thread

RE: Use of RCA 237 Tubes in Radio with AC Powered Filiments - by Phlogiston - 06-20-2015, 12:46 AM

Users browsing this thread: 1 Guest(s)

Recent Posts
Philco 60 Squealing
I seem to remember eliminating a squeal by changing the IF frequency by a few KHz. Not that you should put too much tru...fenbach — 08:48 PM
Philco 42-390, code 121 speaker
These speakers pop up on eBay regularly, even if at bloated prices. Honestly, have not seen many parts on swapmeets.morzh — 08:38 PM
Philco 38-7 Speaker
The put-put is not like the speaker problem.morzh — 08:29 PM
Mission Bell Model 19A Car Radio
Hello everyone, As mentioned in my last post I was going to see if the vibrator / rectifier section could be persuaded...Antipodal — 08:21 PM
Philco 60 Squealing
Wondering if I did it backwards. If a coil was wound backwards, the oscillator would not work at all. Old school...Chas — 07:23 PM
Philco 38-7 Speaker
4-ohm speaker. Black, Green leads.tludka — 07:00 PM
Philco 42-390, code 121 speaker
#87 on the schematic. This radio had a 8" Zenith speaker attached to it when I got it. I do don't know the hist...Stevelog — 06:39 PM
Philco 60 Squealing
I'm pretty sure I now have the litz wire soldered. This did not make any difference. Back in April I rewound the seconda...dconant — 06:25 PM
Philco 38-7 Speaker
Just to make sure, you chose either 4 ohm into 5K or into 10K? (blk-org or blk-grn)morzh — 06:23 PM
Philco 38-7 Speaker
I have let this one sit because of other duties. Now I am back, and I have a couple of questions. I hooked up a Hammond ...tludka — 05:34 PM

Who's Online

There are currently 4817 online users. [Complete List]
» 1 Member(s) | 4816 Guest(s)