1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Home Radios

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

Linear Mode
Does size matter?
RodB
Phorum Expert
*****
Posts: 1,172
Threads: 45
Joined: Feb 2015
City: Roseville, MN
#6

12-11-2023, 12:14 PM
The resistor sets the bias for the tube, the capacitor is a bypass for the rf. As Terry said, the resistor value is critical to keeping the tube gain optimal. The capacitor value is more lenient. I've seen it low as 0.01mfd but I would go with what was in the radio.
Find
« Next Oldest | Next Newest »
Thread Closed


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



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 1025 online users. [Complete List]
» 1 Member(s) | 1024 Guest(s)
Avatar

>
  1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Home Radios