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

37-89 bakelite caps??
#5

I have completed the recapping of my 37-89 and gone thru a re-alignment, but have a problem.

The radio plays pretty well, but "motorboats" at about 600kc, which happens to be the frequency for the low-end rf alignment. It does this during alignment with the signal generator connected if I vary compensator 12a slightly off peak output either way, as well as with the antenna connected if I tune down to about 700kc.

With the antenna connected, if I tune past the "motorboating" down to about 550kc it stops and I can pick up a station below that frequency.

Can anyone help me out on the likely problem or how to correct it?

Thanks Dick


Messages In This Thread
37-89 bakelite caps?? - by Richard Moore - 06-15-2011, 07:54 AM
Re: 37-89 bakelite caps?? - by 7estatdef - 06-15-2011, 08:14 AM
Re: 37-89 bakelite caps?? - by Ron Ramirez - 06-16-2011, 06:53 AM
Re: 37-89 bakelite caps?? - by Richard Moore - 06-16-2011, 02:18 PM
Re: 37-89 bakelite caps?? - by Richard Moore - 06-30-2011, 09:43 PM
Re: 37-89 bakelite caps?? - by Texasrocker - 07-01-2011, 02:51 PM
Re: 37-89 bakelite caps?? - by Richard Moore - 07-02-2011, 12:04 PM
Re: 37-89 bakelite caps?? - by Texasrocker - 07-04-2011, 09:13 PM



Users browsing this thread:
[-]
Recent Posts
Philco 42-345 Restoration/Repair
Vlad95, Thank you for the stringing guides and wow there are so manyosanders0311 — 06:01 PM
5U4 vs 5Z4 tubes
A pre war Hallicrafters, and an early one too, very nice! 1936 is pretty early for metal tubes too, which would explain ...Arran — 05:58 PM
Philco 42-345 Restoration/Repair
Thanks Rod, "When you hear the background hiss and no station it usually indicates that the oscillator quit" ...osanders0311 — 05:52 PM
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

[-]
Who's Online
There are currently 1409 online users. [Complete List]
» 2 Member(s) | 1407 Guest(s)
AvatarAvatar

>