Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12) x

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

Help on A Sparton 813
#1

Well, it looked pretty good on E-Pay, and arrived as a "Kit" with the cabinet in 4 pieces. A barn special at best. Again, split veneer on part of the top, but at least the buttons are still good. This one has mechanical tuners for the pushbuttons where you tune a station, lock the button by squeesing it shut, and it "remembers" Cool.

Also, this set uses two 1A5 pentodes in parallel for the output. I've never seen this arrangement before in a radio, but with a little digging, I see that there were also Philco's that used a similar arrangement. Why. I'll never know, since each pentode would give .1 watt on it's own. And, remember this is a battery set, wasn't there a better way to do it?

Anyway, one of the 1A5's is missing from the set, and I am wondering if I can get by with just one. I know the volume would be diminished somewhat. I was also thinking about making a socket adapter to run a 3V4 to do the job of both tubes, which would be 100% reversable.

Building a little A-B power supply should be trivial.

I am wondering if anyone out there has tackled one of these before.

Box number 2 of the same auction has not been opened yet. Equally bizarre , I hope. Stay tuned.


Messages In This Thread
Help on A Sparton 813 - by codefox1 - 04-08-2009, 05:16 PM
Re: Help on A Sparton 813 - by Texasrocker - 04-10-2009, 03:23 AM
Re: Help on A Sparton 813 - by codefox1 - 04-11-2009, 10:22 AM
Re: Help on A Sparton 813 - by Texasrocker - 04-12-2009, 01:14 AM



Users browsing this thread:
[-]
Recent Posts
Philco 42-345 Restoration/Repair
RodB :beerchug:Vlad95 — 10:22 AM
Philco 42-345 Restoration/Repair
Vlad, you nailed it. Swiss and German roots.RodB — 09:54 AM
5U4 vs 5Z4 tubes
Well this is a Hallicrafters SX/9 circa 1936. No real issues so far although I dodged a real bullet with a cap that was...bridkarl — 07:59 AM
5U4 vs 5Z4 tubes
The pinout is the same but the 5U4 has a 3 amp filament, verses 2 amps or less on the 5Z4. I think that the pinout of a ...Arran — 12:04 AM
Philco 42-345 Restoration/Repair
By the way. osanders0311 Take a look here: Dial cord stringing Guides May be here you can fount correct string settin...Vlad95 — 11:15 PM
5U4 vs 5Z4 tubes
5U4 and 5Z4 almost identical. I think nothing happened if you left 5U4 instedad 5Z4 long time. Just heater current 5U4 ...Vlad95 — 11:02 PM
Philco 42-345 Restoration/Repair
Hello Vlad95 , Very Funny ! Sincerely Richardradiorich — 11:01 PM
Philco 42-345 Restoration/Repair
RodB You are European yourself   :evil: I'm Canadian for the last 30 years  :snowman: But not Yankee  :lol: Vlad95 — 10:49 PM
Philco 42-345 Restoration/Repair
The band switch selects different oscillator coils for the band selected. I would look for a bad connection in the switc...RodB — 10:31 PM
Philco 42-345 Restoration/Repair
Hang in there...PaulPaul Philco322 — 09:30 PM

[-]
Who's Online
There are currently 750 online users. [Complete List]
» 3 Member(s) | 747 Guest(s)
AvatarAvatarAvatar

>