Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12, 2025) x

Thread Closed

Philco 80 jr. rectifier tube hot
#11

Thanks for the tips. I was able to work on it last night for a little while.

Arran, the plates on the 80 never got to a glowing stage but I'll keep that in mind at the next power up.

Bob, thanks for the links to Ron's repair tips. I had seen the modification for the gimmick and the 2meg resistor change. I was going to wait on those until all other work was done. I missed the tip on resistors 9 and 11. That was timely advise. I'm currently in that section and was going to replace #11 the 16k and then noticed the wattage. Back when I first repaired this (22 years ago) I replaced that resistor with a 1 watt carbon composition, rookie mistake. Ron's recommendation was a three watt. I didn't have a three watt so I made a replica dogbone with 3 resistors in parallel. I have a 33k and two 56k 1 watt flameproof resistors inside a tube filled with epoxy. Is my theory correct that 3; 1 watt resistors can handle the same power as a single 3 watt? Actual resistance measurement was within 1% of rating called for. I still need to paint it though. I also missed there fact that cap block #10 was shown twice on the schematic, now it all makes sense. I don't know how many times I tried to trace this out and still missed that.


Attached Files Image(s)
   


Messages In This Thread
Philco 80 jr. rectifier tube hot - by Mike L - 08-28-2016, 04:29 PM
RE: Philco 80 jr. rectifier tube hot - by sam - 08-28-2016, 05:08 PM
RE: Philco 80 jr. rectifier tube hot - by Mike L - 08-30-2016, 08:20 PM
RE: Philco 80 jr. rectifier tube hot - by Arran - 09-02-2016, 04:50 AM
RE: Philco 80 jr. rectifier tube hot - by Mike L - 09-03-2016, 10:31 AM
RE: Philco 80 jr. rectifier tube hot - by Mike L - 09-04-2016, 09:28 AM
RE: Philco 80 jr. rectifier tube hot - by Mike L - 09-11-2016, 03:06 PM
RE: Philco 80 jr. rectifier tube hot - by Mike L - 09-12-2016, 07:47 PM
RE: Philco 80 jr. rectifier tube hot - by Mike L - 09-13-2016, 08:25 PM
RE: Philco 80 jr. rectifier tube hot - by Mike L - 09-22-2016, 07:45 PM
RE: Philco 80 jr. rectifier tube hot - by morzh - 09-22-2016, 10:06 PM
RE: Philco 80 jr. rectifier tube hot - by Mike L - 09-24-2016, 09:20 AM
RE: Philco 80 jr. rectifier tube hot - by morzh - 10-05-2016, 07:59 AM
RE: Philco 80 jr. rectifier tube hot - by Mike L - 10-05-2016, 07:28 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco P45-6365 Universal Transformer Instruction Manual
Can anyone guide me to where this may be found?GRG — 03:00 PM
54C Complete Teardown/Rebuild
I don't think that I have encountered a 12Z3 before, curious how it uses one of those but includes a #43, which is a 25 ...Arran — 02:17 PM
HiFi (Chifi) tube amp build - but my own design.
It's the other forum. I'm also in DIY, but mostly read there. Honestly, I kinda jumped into this without much thought to...TV MAN — 10:43 AM
Philco 71 Code 125
Hello,  I am in need of a schematic for this radio. Mine has the three separate circular tube shields and a shadow me...dconant — 08:06 AM
Stromberg Carlson 1500 Squeal
And life just keeps getting more complicated.dconant — 07:57 AM
54C Complete Teardown/Rebuild
Hello Roy, here is this one sincerely Richardradiorich — 12:45 AM
54C Complete Teardown/Rebuild
Richard, Had grabbed it already but thank you just the same.  I find myself wanting to find some way to block out the...glyphmon — 12:03 AM
54C Complete Teardown/Rebuild
Hello roy, here is a link to the schematic . Sincerely Richardradiorich — 11:54 PM
54C Complete Teardown/Rebuild
Richard, The Silvertone 2014 also is a transformerless set, so I am incorporating a 1:1 600 ohm audio isolation transfo...glyphmon — 11:37 PM
Preliminary work on wife's Silvertone 2014
Did an alignment today which was interesting.  IF alignment went great, almost all was already spot-on.  Adjusting on th...glyphmon — 11:35 PM

[-]
Who's Online
There are currently no members online.

>