Posts: 1,824
Threads: 114
Joined: Jul 2014
City: Sneedville, TN
Yes, the 71A tubes are getting expensive. The cheapest I can find them on eBay is $18 plus shipping for good tested tubes. I advise you to check the filament voltage at the socket before you plug anything into it. The 71A has a 5 volt filament, so the voltage between the two fat pins should not be much above that. It can be AC or DC according to the spec sheet.
[Image: https://64.media.tumblr.com/aede1094fb9b...2e5b49.jpg]
You can also check the DC voltage from the plate to the filament, then check the grid bias voltage, and compare them to those shown on the spec sheet to see if they are in the ball park. Beyond that, about all you can do is hope for the best. Good luck.
Messages In This Thread
RE: Philco Model 86 - by mikethedruid - 12-01-2021, 01:47 PM
Users browsing this thread: 18 Guest(s)
|
|
Recent Posts
|
|
91H Code 126 Restore
|
| Hi Nick,
Usually the dashed lines connected to components means the part is a substitute in the circuit for specific ...RodB — 09:42 AM |
|
462ron
|
| Mike when I got to the guy’s house to pick up the set, he gave me a tour of his home and garage. Wow, his living room co...462ron — 09:10 AM |
|
91H Code 126 Restore
|
| I'm pretty sure that the dotted line I circled in an earlier post signifies that it is applicable to the 226 model which...RealRider — 08:05 AM |
|
Philco 49-1040
|
| Hello bob,
that underside looks like it is all original !
Sincerely Richardradiorich — 02:07 AM |
|
Philco 49-1040
|
| Oh yes, many bumblebees and loktal tubes.
The cutout is for the speaker. Here's a photo from a different set.
Bob Andersen — 12:59 AM |
|
Philco 49-1040
|
| Bob;
Looks like another "Bumble Bee" special, like my Brand Z T.O radios. Is that section they took out of ...Arran — 12:19 AM |
|
Philco 49-1040
|
| Hello Bob,
You are like the home for lost tv's like how people bring pets home !
Sincerely Richardradiorich — 12:00 AM |
|
Philco 49-1040
|
| I thought I had an arrangement to restore this set for a customer but his wife said heck no. Instead, he gave it to me....Bob Andersen — 10:29 PM |
|
Philco 46-480 Electronic Restoration
|
| I kept working on reassembly this week. I wasn’t able to solder for a few days while it was too cold (single digit low t...jrblasde — 09:27 PM |
|
Atwater-Kent 84, restoration.
|
| Well, powering it up would be too good to be true, and I had that feeling.
Before I did, I decided to check the coils...morzh — 06:02 PM |
|
Who's Online
|
There are currently 5054 online users. [Complete List]
» 1 Member(s) | 5053 Guest(s)
|
|
|
|
 
|
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
