Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

6A3 replacements
#1

I finally got my Philco 116X working, but with a borrowed pair of 6A3 output tubes. Reception and audio quality are outstanding.

Short of buying a working pair of 6A3s at current prices (thanks, audiofools) what might be recommended as replacements? 6B4G is electrically the same tube, octal base, same high prices. 

Changing the tube sockets / types is heresy to many on the forum, but this set is no beauty queen. I'd like to enjoy the set as work bench company. All electronics would be completed neatly and to a high standard, as has the rest of the chassis.

I considered using a single 6AS7 with its two sections in push-pull, or a pair of triode connected 807s with operating voltages accordingly changed. Those types are already on hand, in storage. I believe those choices could approximate present current draw from the power transformer, audio output transformer impedances, and available audio power output.

All help is greatly appreciated!

Keep warm, this weekend.

-O.B.
#2

I don't know what the audiophool prices are but you could get a pair of these used. I've bought from him before and had no problems.
https://docs.google.com/spreadsheets/d/1...0foD#gid=1
#3

Bob Dobush got me my pair of 6B4 for a very reasonable price.
I don't see any reason to screw up a perfectly good radio.

People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
#4

+3 for Bob Dobush... Icon_thumbup Icon_thumbup

--
Ron Ramirez
Ferdinand IN
#5

I have used Bob  Icon_thumbup No problems. One tube was noisy, he was quick to make it right. Very fast communication. And reasonable.
Joe

Joe Bratcher near Louisville, KY




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 4814 online users. [Complete List]
» 1 Member(s) | 4813 Guest(s)
Avatar

>