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

Thread Closed

Philco 19 Restoration (from yet ANOTHER Newbie
#2

Jeff

We will help you with concrete questions and troubleshooting once you get to that.

But first things first, please read through the very basic things one does when starting with an old radio.

That means:

1. No powering up before checking the state of the chassis. Big NO-NO!!!
2. No powering up before changing all electrolytic caps and all the caps that are from B+ to Chassis.
3. Very desirable - changing ALL paper caps. Leave micas alone for the time being.
4. Remove the rectifier tube, measure the load resistance to see if a short is present.
5. Check ALL tubes, so they at least present no danger and could be expected to work reasonably (even if weak) - no shorts or other BAD stuff.
6. At this point if you feel an itch, bring the transformer slowly up by using variac, measure the voltages, see if the output is reasonable and no smoke escapes.
7. Check all the resistors, replace those that are way out of spec (20% and more) or open. Make sure your wire-wound ones are not open, especially the one that connects the negative of the rectifier to the chassis. Sometimes those are Candohms and those are know to open.
8. Replace the rectifier and the tubes, then you can power it now, but ONLY slow using a variac and (very desirable, but absolutely necessary with "hot chassis'") isolation transformer. While bringing the voltage up, do the reading, making sure there are no load shorts / problems.

Now if all holds, nothing smokes and all glows, you can start troubleshooting.
That is where we come in.


Messages In This Thread
RE: Philco 19 Restoration (from yet ANOTHER Newbie - by morzh - 04-18-2013, 10:17 AM
RE: Philco 19 Restoration (from yet ANOTHER Newbie - by boxjoint - 09-26-2013, 02:58 AM



Users browsing this thread: 3 Guest(s)
[-]
Recent Posts
Plug Voltages Needed For A 1943 CRV-20130 Power Supply
hello david, I have a similar generator in my collection that features a cast iron, single-cylinder Briggs & Stratt...radiorich — 01:00 AM
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

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

>