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

Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

When to recap a recap?
#3

When i saw this post I thought you were referring to a "recap" job done by someone else? I have such a set, and I will be recapping the recap because the workmanship is just not that great, and the radio performs poorly due to an RF bypass cap being omitted. I can give you an example, the fellow who did it thought it would be a good idea to check the values of the resistors, and replaced the ones he though were out of tolerance, however he replaced the cathode bias resistor on the power output tube, he replaced a 2 Watt resistor with either a 1/4 or a 1/2 Watt, it does not matter which now since it was greatly undersized and scorched. He also piggy backed the cathode bypass capacitor across it, which was not to bright if you want it to last.
I would say that if it was your own work, and are satisfied with it, then maybe try powering up the sets slowly on a variac. Japanese electrolytics are usually pretty good (except for Elnas and Jamecons), and they are new enough that they could be reformed successfully, either with the rest of the set or by powering them up on a resistance/capacitance bridge though clip leads.
Regards
Arran


Messages In This Thread
When to recap a recap? - by David - 01-12-2025, 09:22 PM
RE: When to recap a recap? - by radiorich - 01-12-2025, 09:26 PM
RE: When to recap a recap? - by Arran - 01-13-2025, 03:02 AM
RE: When to recap a recap? - by David - 01-13-2025, 12:12 PM
RE: When to recap a recap? - by TV MAN - 01-13-2025, 12:54 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
B&K 1077B no video
Hello Tim, I would if it's a leaky Capacitor So are all 3 of those B- voltages low then ? Sincerely Richardradiorich — 01:55 AM
B&K 1077B no video
I found a schematic and think I have the problem traced down to the minus power supply. I have very low voltages that go...TV MAN — 12:41 AM
RCA 15X
I'd try replacing the bulb first and if that doesn't do it, then change the 35Z5 and see if the problem goes away.NostalgiaRadioTime — 12:28 AM
B&K 1077B no video
Hello Tim, I have that exact unit in my shop too plus a Sencore unit there are times I like one or other !!. Sincerely...radiorich — 11:07 PM
RCA 15X
Everthing goes at once, maybe it's the cold weather, I have had 2 dial strings break and no my little RCA is having dial...Paul Philco322 — 10:26 PM
Philco 91 Schematic
Hi Dan, I can't explain this specific resistor but I have seen the use of a switch to apply B+ voltage to screen gri...RodB — 09:36 PM
6TPZ and 5TPO Radio Help
I suspect it's been repaired before. And I suspect whoever repaired it, wanted to re-use old transistors' pin stubs in o...morzh — 09:24 PM
B&K 1077B no video
Thanks Rich! I'll take a look and see what he has. I know there's more modern equipment to be had, but this one I know a...TV MAN — 09:11 PM
B&K 1077B no video
Hello Tim, Here is a link to restoration of one on Phil's old radios site ! Sincerely Richard bk1077bradiorich — 09:01 PM
6TPZ and 5TPO Radio Help
I'm a little befuddled on this one. Should X5 and X4 be tied together like this?  It looks like someone added this at so...R3Sons — 07:33 PM

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

>