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


Philco C661
#4

The caps have been replaced and remounted. I did not swap out the wafer cap C10 although that might have to happen in the future. I replaced the selenium rectifier with a 1N4007 diode and added 100 ohm 5 Watt resistor in series with R16 to give a total of 220 ohms after the diode. There was also one bumble bee style cap on the top side of the radio that I swapped out. Since it is visible I did put it inside a paper cap tube that I had although I did have to cut the length of the tube down a bit to get it to fit the space.

   

   

When I powered up the set I got good voltage readings at the point just after the added 100 ohm resistor (105vDC) and reasonably close readings at other points around the set. Unfortunately I was hearing absolutely nothing, not even static. After a bit of checking I realized I had put the audio output tube 3V4 in the wrong socket by mixing up with the 1U5(1S5) socket. After swapping them I was getting loud and clear stations.

There is still some rust cleanup to do and I have to think about getting the battery connections cleaned up and useable as well. Its clear that the A battery leaked at some point. It uses two P77 batteries for the A voltage and a P144 for the B voltage. There is still some more cabinet work to do.

Here's the voltage check with the 100 ohm resistor still outside the chassis. I was planning on having to try a few different resistors but this one was fine the first time around.

   


Messages In This Thread
Philco C661 - by klondike98 - 03-09-2026, 07:58 PM
RE: Philco C661 - by klondike98 - 03-10-2026, 11:44 AM
RE: Philco C661 - by klondike98 - 03-10-2026, 08:13 PM
RE: Philco C661 - by klondike98 - 03-30-2026, 10:41 PM
RE: Philco C661 - by morzh - 03-30-2026, 10:52 PM
RE: Philco C661 - by radiorich - 03-30-2026, 10:56 PM
RE: Philco C661 - by klondike98 - 04-04-2026, 10:12 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Plug Voltages Needed For A 1943 CRV-20130 Power Supply
Try looking at this site the book mark is for a old generator that I was given. David    https://radionerds.com/index.ph...David — 08:36 PM
Plug Voltages Needed For A 1943 CRV-20130 Power Supply
Hello Everyone, I am looking for voltage identification for all the pin positions on the socket of a CRV-20130 power su...Tonym4704 — 08:16 PM
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

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

>