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Philco 514 Questions
04-05-2019, 09:32 PM
(04-05-2019, 08:49 PM)RodB Wrote: Now I need the alignment instructions for the Philco 511, 512, 513, 514 or 515 and maybe the 86 would work. https://philcoradio.com/library/index.ph...receivers/ -- Ron Ramirez Ferdinand IN 
04-12-2019, 01:42 PM
Thank you Ron. I figured it was here somewhere, just have to use the right keyword ("alignment" doesn't work). Your set of instructions are much better than the basic ones I found elsewhere.
So, I have had a change in direction on the speaker. Instead of the re-cone job the owner has decided to go with a PM speaker mounted in place of the cone. I have located an 8 ohm, 8 inch, full range driver to connect to an output transformer. To check this configuration, I used my test speaker connected to a universal OT and tested the output of each of the 6 transformer speaker lugs. The output is now so loud I can't turn it down with the volume control. The set also oscillates at various positions of the dial. I'm thinking there's too much gain and maybe reducing the B+ might fix that. The 10K volume pot. also might be a problem. More testing to resume. 
04-12-2019, 02:10 PM
About that oscillation: have you neutralized the set?
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
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
04-15-2019, 08:20 PM
< I get close to the chassis with my hand the signal strength gets noticeably stronger.
Do you have the chassis grounded to something? Not having a ground connected to it can cause this anomaly. GL When my pals were reading comic books I was down in the basement in my dad's workshop. Perusing his Sam's Photofoacts Vol 1-50 admiring the old set and trying to figure out what all those squiggly meant. Circa 1966 Now I think I've got! Terry
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