Philco 514 Questions

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Philco 514 Questions

RodB
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Posts: 988
Threads: 40
Joined: Feb 2015
City: Roseville, MN

#19

04-15-2019, 01:25 PM

I haven't neutralized the RF sections yet, I have a few things to take care of first. I checked the B+ voltages and they are higher than documented recordings and the filament voltages are slightly higher. So I increased the primary dropping resistor value from 9 ohms to 34 ohms. This brought the voltage on the 90 year old primary winding to 112V and the B+ and filament voltages to where they should be. I discovered the 10K volume control to be erratic so I'll have to replace it. Without the control in the circuit the volume is very loud.

I want to get all the component issues out of the way then fasten the bottom to the chassis then do the neutralization because I noticed whenever I get close to the chassis with my hand the signal strength gets noticeably stronger.

Rod

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Messages In This Thread

Philco 514 Questions - by RodB - 01-12-2019, 02:42 PM

RE: Philco 514 Questions - by RodB - 01-12-2019, 04:53 PM

RE: Philco 514 Questions - by Greggshere - 01-12-2019, 06:01 PM

RE: Philco 514 Questions - by Arran - 01-13-2019, 03:02 AM

RE: Philco 514 Questions - by RodB - 01-13-2019, 03:50 PM

RE: Philco 514 Questions - by RodB - 01-16-2019, 11:32 AM

RE: Philco 514 Questions - by morzh - 01-16-2019, 11:52 AM

RE: Philco 514 Questions - by RodB - 01-23-2019, 02:08 PM

RE: Philco 514 Questions - by RodB - 01-26-2019, 06:09 PM

RE: Philco 514 Questions - by Radioroslyn - 01-26-2019, 07:24 PM

RE: Philco 514 Questions - by RodB - 01-27-2019, 08:12 PM

RE: Philco 514 Questions - by RodB - 02-10-2019, 04:23 PM

RE: Philco 514 Questions - by Arran - 02-10-2019, 05:08 PM

RE: Philco 514 Questions - by RodB - 03-11-2019, 01:48 PM

RE: Philco 514 Questions - by RodB - 04-05-2019, 08:49 PM

RE: Philco 514 Questions - by Ron Ramirez - 04-05-2019, 09:32 PM

RE: Philco 514 Questions - by RodB - 04-12-2019, 01:42 PM

RE: Philco 514 Questions - by morzh - 04-12-2019, 02:10 PM

RE: Philco 514 Questions - by RodB - 04-15-2019, 01:25 PM

RE: Philco 514 Questions - by Radioroslyn - 04-15-2019, 08:20 PM

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