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

Philco 90 Oscillator Resistor Question
#1

Can anyone tell me if I should replace the 5000 ohm resister that feeds the #27 osc tube with a lower value? I'm asking because on a website http://www.rickstuberadios.com/ he mentions that the rushing noise in his Philco 89 was due to the 15,000 ohm resister resistor that fed the #36 tube osc changing to a higher value.

He changed the 15K to 7.5K. I am getting a rushing noise & drop in volume in my Philco 90 similar to what was described on the website & I was wondering if I should change my 5K resistor to say 3K. Any one else have this problem or familiar with it?

My Philco 90 is the type with one #47 tube

Thanks......Joe!
#2

Which variation of the model 90 are you working on?
http://www.nostalgiaair.org/PagesByModel...013881.pdf
Does it have 2-45's, 1-47 or 2-47's for the output?

Carl
Northern Panhandle, WV




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco model 38 code 121 not receiving signal.
That's true. Of course If I were to get a vtvm I'd probably have to sink money in to it to get it working right. Probabl...Stormlord5500 — 08:44 PM
Philco model 38 code 121 not receiving signal.
A DMM is good enough. One rarely has to measure indictance, but if you do, short of getting a serious LCR meter (I hav...morzh — 07:35 PM
Testing a speaker and output transformer Trutone A2-G
You guy's are right on. I found a broken wire on the speaker plug that I replaced and all is well now. Have better volu...murf — 03:43 PM
Philco model 38 code 121 not receiving signal.
I need to get a vtvm. I think that little component tester is just more accurate. Plus it shows the inductance which is ...Stormlord5500 — 03:07 PM
Philco model 38 code 121 not receiving signal.
I use a pair of Mastercraft brand DMMs from Canadian Tire, from what I read most of those DMMs use the same main chip re...Arran — 02:36 PM
Philco model 38 code 121 not receiving signal.
Thank you sir. Yes I feel good and also relieved because this one's been weighing on me a bit.Stormlord5500 — 11:18 AM
Philco model 38 code 121 not receiving signal.
It feels good don't it? Good luck on the rest.Paul Philco322 — 11:06 AM
Philco model 38 code 121 not receiving signal.
I've reinstalled the coil. Now IT'S ALIVE!!!!!! I fired up my TinySA on signal generator mode and set it to 1400Kc and ...Stormlord5500 — 11:01 AM
Philco model 38 code 121 not receiving signal.
Yes, Walmart, right up there with Fluke.RodB — 11:00 AM
PT 6 chassis screws size???
it certainly won't be metric! SAE threads were all that was known then. Take care, - GaryGarySP — 10:58 AM

[-]
Who's Online
There are currently 1842 online users. [Complete List]
» 2 Member(s) | 1840 Guest(s)
AvatarAvatar

>