Does size matter?

Register

Guest Join Us

Hello Guest,

Please feel free to join us!
There are many more parts of the Phorum that only members can see.

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

Thread Rating:

0 Vote(s) - 0 Average
1
2
3
4
5

Linear Mode

Does size matter?

fenbach
Member

Posts: 145
Threads: 29
Joined: Dec 2016
City: portland, OR

#1

12-10-2023, 05:18 PM

On the Rider schematic for a 37-630 [PHILCO, pg 7-57], the capacitor/resistor pair on the cathode of the 6K7G I.F. amplifier tube is 0.05uf and 400 ohms. For a 37-640, it's 0.25uf and 700 ohms. But my 37-630 itself has a 0.25uf cap and a 400-ohm resistor, both apparently original. Should I go with the schematic for the 630 or use the values in the radio? Or does it matter?
Thanks

37-640 schematic. http://www.nostalgiaair.org/PagesByModel...013216.pdf

(This post was last modified: 12-10-2023, 05:21 PM by fenbach.)

Find

« Next Oldest | Next Newest »

Messages In This Thread

Does size matter? - by fenbach - 12-10-2023, 05:18 PM

RE: Does size matter? - by Radioroslyn - 12-10-2023, 07:03 PM

RE: Does size matter? - by fenbach - 12-10-2023, 07:20 PM

RE: Does size matter? - by radiorich - 12-10-2023, 09:49 PM

RE: Does size matter? - by DaleHCook - 12-11-2023, 10:37 AM

RE: Does size matter? - by RodB - 12-11-2023, 12:14 PM

RE: Does size matter? - by Arran - 12-11-2023, 04:28 PM

RE: Does size matter? - by DaleHCook - 12-11-2023, 06:46 PM

RE: Does size matter? - by fenbach - 12-11-2023, 08:41 PM

RE: Does size matter? - by morzh - 12-11-2023, 10:11 PM

RE: Does size matter? - by RodB - 12-12-2023, 10:52 AM

View a Printable Version

Users browsing this thread: 1 Guest(s)

Recent Posts
Rogers Majestic R-646
Thanks RpdB I don't think there's much difference with interstage transformers of different models other than dimersion...Vlad95 — 03:27 PM
Rogers Majestic R-646
Vlad; I looks like your set has the same problem that mine did, both a bad output transformer, and a bad audio inters...Arran — 03:21 PM
Rogers Majestic R-646
Ouch! Not often the secondary takes a hit. Wish there was a better solution. I have a good interstage transformer but it...RodB — 02:59 PM
Rogers Majestic R-646
By the way, the bypass you suggested is a rare solution in some circuits. For example, this schematics solution is used...Vlad95 — 01:43 PM
Rogers Majestic R-646
No, you are wrong, because you did not know the details. Unfortunately, only ONE winding out of six is intact in both t...Vlad95 — 01:14 PM
Rogers Majestic R-646
The output 45s are still in push-pull because the transformer secondary winding is still in the grid circuit providing o...RodB — 11:52 AM
Rogers Majestic R-646
Thanks RodB for the help. But this is not a real solution to this situation, not even a temporary one. Because the firs...Vlad95 — 11:34 AM
Philco Model 16 wiring question
I was going to check the voltages as you suggested and hooked it up to my dim bulb. It appears I have a short. The bul...bobclausen — 10:34 AM
Rogers Majestic R-646
You can bypass the interstage transformer by disconnecting the primary, connect a load resistor of about 10k - 20k to th...RodB — 09:40 AM
HiFi (Chifi) tube amp build - but my own design.
So, here's Prince on stage halfway through Purple Rain when he stoops down to his tech and says "Rod, pull out that...RodB — 09:17 AM

Who's Online

There are currently 1028 online users. [Complete List]
» 1 Member(s) | 1027 Guest(s)