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

Model 80 jr resistors getting hot
#18

I’ve measured 165 V through the 16 K resistor I’m coming up with 10.3 mA and 1.7 W. The resistor is a 5 W resistor that I have installed. So I believe it should be OK. However this resistor is still very hot to the touch, And from what I’ve read in the thread most likely it’s because the resistor is smaller in size then original. Everything in the radio seems to be working fine and the performance is good and I’m receiving all stations across the band. The resistor doesn’t show any signs of burning. My plate voltage on the 36 oscillator detector tube is showing right on spec 245 V my screen grid voltage on the 36 oscillator tube is showing a little low 86.7 V. If I go by the Riders schematic it says the screen grid should be 165 V but when I look at the RCA receiving tube data sheet it says Max volts for the screen grid should be 90 V and then when I read that note above in the tread it says it should be somewhere around 80 V. So I’m a little confused. I’m inclined to think everything is fine.


Messages In This Thread
Model 80 jr resistors getting hot - by Xolo100 - 01-02-2021, 12:43 PM
RE: Model 80 jr resistors getting hot - by morzh - 01-02-2021, 01:45 PM
RE: Model 80 jr resistors getting hot - by morzh - 01-02-2021, 05:33 PM
RE: Model 80 jr resistors getting hot - by morzh - 01-02-2021, 07:14 PM
RE: Model 80 jr resistors getting hot - by morzh - 01-02-2021, 07:22 PM
RE: Model 80 jr resistors getting hot - by morzh - 01-02-2021, 09:43 PM
RE: Model 80 jr resistors getting hot - by n1ps - 01-02-2021, 10:35 PM
RE: Model 80 jr resistors getting hot - by RodB - 01-04-2021, 10:38 AM
RE: Model 80 jr resistors getting hot - by RodB - 01-04-2021, 07:30 PM
RE: Model 80 jr resistors getting hot - by Xolo100 - 01-04-2021, 07:56 PM
RE: Model 80 jr resistors getting hot - by morzh - 01-04-2021, 09:42 PM
RE: Model 80 jr resistors getting hot - by morzh - 01-04-2021, 11:33 PM
RE: Model 80 jr resistors getting hot - by morzh - 04-23-2021, 10:39 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Need Help to ID this radio 11 tube Philco
Thank you. I went to your online library and found 2 schematics. I will download and compare to components!Ken D. — 06:31 PM
Need Help to ID this radio 11 tube Philco
It is a 16B tombstone.morzh — 06:13 PM
Zenith H725
David - sorry, I reread your post and finally saw THD - now the % figures make sense. Thanks for explaining. The PSU...EdHolland — 06:06 PM
Need Help to ID this radio 11 tube Philco
Hi Everyone, New member but have been reading this for awhile for tips! Vaccum tubes were before my time so bear with ...Ken D. — 06:03 PM
My Philco 37-116 Restore
Thank you MrFixR55, I appreciate your comments very much. I do not detect much hum if any so I will be staying with the ...dconant — 05:15 PM
My Philco 37-116 Restore
Hi DConant Yes, you can replace chokes with resistors.  You do stand the risk of increased hum.  the solution is to inc...MrFixr55 — 04:23 PM
Zenith H725
1.7-3.9 %, a modified Sine wave inverter is around 25%. Most generators from big box stores run 10% at a 50% load. What ...David — 04:06 PM
My Philco 37-116 Restore
I am having a heck of a time doing the alignment on the AM band. I can't seem to dial in the 1500 KC oscillator. I can h...dconant — 03:35 PM
Zenith H725
David - I think I understand but what units are you discussing (Low of 1.7, high of 3.9)? Budget constraints for Ham ...EdHolland — 01:43 PM
My Philco 37-116 Restore
You're doing great. I wish I could be more involved, but my mind is right now preoccupied with the reason I am here in ...morzh — 12:21 PM

[-]
Who's Online
There are currently 730 online users. [Complete List]
» 2 Member(s) | 728 Guest(s)
AvatarAvatar

>