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

Thread Closed

Philco 66 - Sweet Music at Last!!
#33

Joe, really need to get the audio amp section working well before chasing signals from the antenna or injection of signals from your generator. Particularly if your working without a scope. If your using the speaker output to do things and the amp is not working properly, well, it's like working in the dark. Tone insertion on the control grid of the output tube and the first audio seem to be the next phase as was indicated earlier. You will be after the volume control so keep the generator audio gain down low. Hate to see you put a large signal in and launch your speaker cone. Needless to say, you also need to confirm the voltages on the two tubes. Something is wrong in the audio if your not getting a hum out while touching the center tap of the volume control with the volume up. Voltage measurements will give you good idea where the problem is. Signal input to the two control grids will also tell you which section. It could be something as simple as the wires going to the speaker are not wired correctly. They are color coded on the schematic. I only suggest that as you indicated in a previous post that they were disconnected.
Good luck and we are watching. The audio section is pretty straight forward.
Jerry

A friend in need is a pest!  Bill Slee ca 1970.


Messages In This Thread
Philco 66 - Sweet Music at Last!! - by jph14 - 04-22-2012, 08:07 PM
RE: Philco 66 - by codefox1 - 04-23-2012, 12:21 PM
RE: Philco 66 - by jph14 - 04-23-2012, 02:06 PM
RE: Philco 66 - by 7estatdef - 04-23-2012, 10:14 PM
RE: Philco 66 - by jph14 - 04-24-2012, 06:38 AM
RE: Philco 66 -Nothing - by jph14 - 04-27-2012, 09:53 AM
RE: Philco 66 -Nothing - by TA Forbes - 04-27-2012, 11:31 AM
RE: Philco 66 -Nothing - by jph14 - 04-27-2012, 01:28 PM
RE: Philco 66 -Nothing - by morzh - 04-27-2012, 11:57 AM
RE: Philco 66 -Nothing - by 7estatdef - 04-27-2012, 04:36 PM
RE: Philco 66 -Nothing - by jph14 - 04-27-2012, 04:50 PM
RE: Philco 66 -Nothing - by 7estatdef - 04-28-2012, 07:11 AM
RE: Philco 66 -Nothing - by jph14 - 04-29-2012, 11:50 AM
RE: Philco 66 -Nothing - by rghines1 - 04-29-2012, 02:47 PM
RE: Philco 66 -Nothing - by jph14 - 04-30-2012, 04:04 PM
RE: Philco 66 -Nothing - by rghines1 - 04-30-2012, 04:56 PM
RE: Philco 66 -Nothing - by jph14 - 04-30-2012, 07:47 PM
RE: Philco 66 -Nothing - by rghines1 - 04-30-2012, 08:55 PM
RE: Philco 66 -Nothing - by 7estatdef - 04-29-2012, 02:36 PM
RE: Philco 66 -Nothing - by jph14 - 05-01-2012, 04:10 PM
RE: Philco 66 -Nothing - by morzh - 05-01-2012, 04:20 PM
RE: Philco 66 -Nothing - by jph14 - 05-01-2012, 04:24 PM
RE: Philco 66 -Nothing - by morzh - 05-01-2012, 05:01 PM
RE: Philco 66 -Nothing - by jph14 - 05-03-2012, 11:11 AM
RE: Philco 66 -Nothing - by morzh - 05-03-2012, 02:45 PM
RE: Philco 66 -Nothing - by jph14 - 05-03-2012, 02:57 PM
RE: Philco 66 -Nothing - by rghines1 - 05-04-2012, 08:37 PM
RE: Philco 66 -Nothing - by jph14 - 05-05-2012, 05:26 PM
RE: Philco 66 - suspect coil issues - by jph14 - 05-12-2012, 05:34 PM
RE: Philco 66 - Coil troubles? - by jph14 - 05-26-2012, 07:26 AM
RE: Philco 66 - Coil troubles? - by jerryhawthorne - 05-26-2012, 04:15 PM
RE: Philco 66 - Coil troubles? - by jph14 - 05-27-2012, 12:23 PM
RE: Philco 66 - Coil troubles? - by codefox1 - 05-27-2012, 02:04 PM
RE: Philco 66 - Coil troubles? - by jph14 - 05-27-2012, 02:38 PM
RE: Philco 66 - Coil troubles? - by morzh - 05-27-2012, 05:03 PM
RE: Philco 66 - Coil troubles? - by morzh - 05-27-2012, 07:27 PM
RE: Philco 66 - Coil troubles? - by jph14 - 05-27-2012, 07:27 PM
RE: Philco 66 - Coil troubles? - by jph14 - 05-27-2012, 08:48 PM
RE: Philco 66 - Coil troubles? - by 7estatdef - 05-28-2012, 08:40 AM
RE: Philco 66 - Coil troubles? - by jph14 - 05-31-2012, 05:38 PM
RE: Philco 66 - Coil troubles? - by morzh - 05-31-2012, 07:35 PM
RE: Philco 66 - Coil troubles? - by 7estatdef - 05-31-2012, 08:28 PM
RE: Philco 66 - Coil troubles? - by jph14 - 05-31-2012, 09:20 PM
RE: Philco 66 - Coil troubles? - by 7estatdef - 05-31-2012, 09:31 PM
RE: Philco 66 - Coil troubles? - by 7estatdef - 06-01-2012, 06:42 AM
RE: Philco 66 - Coil troubles? - by jph14 - 06-01-2012, 03:07 PM
RE: Philco 66 - Coil troubles? - by 7estatdef - 06-01-2012, 03:52 PM
RE: Philco 66 - Coil troubles? - by jph14 - 06-02-2012, 01:57 PM
RE: Philco 66 - Coil troubles? - by morzh - 06-02-2012, 03:59 PM
RE: Philco 66 - Coil troubles? - by jph14 - 06-02-2012, 04:24 PM
RE: Philco 66 - Coil troubles? - by 7estatdef - 06-02-2012, 05:16 PM
RE: Philco 66 - Coil troubles? - by jph14 - 06-02-2012, 07:20 PM
RE: Philco 66 - Coil troubles? - by 7estatdef - 06-02-2012, 08:11 PM
RE: Philco 66 - Coil troubles? - by jph14 - 06-02-2012, 09:18 PM
RE: Philco 66 - Coil troubles? - by 7estatdef - 06-02-2012, 09:31 PM
RE: Philco 66 - Coil troubles? - by jph14 - 06-02-2012, 10:01 PM
RE: Philco 66 - Coil troubles? - by jph14 - 06-06-2012, 09:58 AM
RE: Philco 66 - Coil troubles? - by 7estatdef - 06-06-2012, 06:45 PM
RE: Philco 66 - Coil troubles? - by jph14 - 06-06-2012, 08:37 PM
RE: Philco 66 - Coil troubles? - by 7estatdef - 06-07-2012, 07:32 AM
RE: Philco 66 - Coil troubles? - by jph14 - 06-07-2012, 09:04 AM
RE: Philco 66 - Coil troubles? - by 7estatdef - 06-07-2012, 09:20 PM
RE: Philco 66 - Coil troubles? - by jph14 - 06-08-2012, 08:21 AM
RE: Philco 66 - Coil troubles? - by 7estatdef - 06-09-2012, 08:25 PM
RE: Philco 66 - Sweet Music! Hold on - by jph14 - 06-11-2012, 03:55 PM
RE: Philco 66 - Sweet Music! Hold on - by jph14 - 06-12-2012, 06:21 AM
RE: Philco 66 - Sweet Music! Hold on - by jph14 - 06-12-2012, 01:58 PM
RE: Philco 66 - Sweet Music at Last!! - by jph14 - 06-17-2012, 10:12 AM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
under chassis parts locator diagram for 1938 Zenith 9s262
Has anyone gone to the trouble of creating an under chassis parts locator image?  Yes, I can identify components by foll...bobloney — 08:57 PM
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

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

>