Follow-up!

Follow-up!

Posted by jedrider (A) on August 13, 2012 at 11:32:59

In Reply to: I am shocked! posted by jedrider on July 21, 2012 at 16:31:58:

Well, all is well in tube amp land ;-)

Bought a batch of slow-blow fuses which were anything but! They didn't look like slow blow, just having the thin wire inside -- is that definitive? So, they all just immediately blew out on startup!

Got fuses at Jameco Electronics instead of the local electronics supply outlet. 45 cents a fuse, can't beat the price, and the correct item. Can't have enought of these. It really pays to be prepared.

Replaced all the cathode resistors with metal film 10 ohm resistors so I can consistently bias the EL34 tubes. Fortunately, these resistors are at the top of the board and easy enough to replace -- don't have to remove anything except the top cover.

I am running 25 ma bias current. Is that too low?

Think I found the bad solder joint in the EL34 socket and reflowed the joint from topside of the circuit board. Crossing my fingers that this will solve the unusual blow-rate on this one socket.

Plugged it in and it sounds just fine -- I've only listened to CeeDee so far though ;-)

Happy listening to all.

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Follow Ups Full Thread

Topic - I am shocked! - jedrider 16:31:58 07/21/12 (24)

RE: I am shocked! - griboon 17:00:52 08/13/12 (0)

Follow-up! - jedrider 11:32:59 08/13/12 (0)

Solution in sight! - jedrider 22:40:28 07/21/12 (12)

RE: Solution in sight! - drlowmu 23:01:50 07/21/12 (11)

Not a Happy Ending - jedrider 16:27:15 07/22/12 (7)

Sorry to hear it - 1973shovel 17:11:22 07/22/12 (5)

I'm looking for a Variac now - jedrider 07:48:11 07/24/12 (4)

RE: I'm looking for a Variac now - drlowmu 19:17:26 07/24/12 (3)

Calm down - jedrider 07:09:12 07/25/12 (2)

RE: Calm down - Tre' 19:30:27 07/26/12 (0)

Calmed - drlowmu 16:05:20 07/25/12 (0)

Sorry, but the fat lady ain't yet sung...... - drlowmu 17:03:27 07/22/12 (0)

RE: Solution in sight! - Jim McShane 11:21:59 07/22/12 (2)

RE: Solution in sight! - drlowmu 12:36:21 07/22/12 (1)

RE: Solution in sight! - Jim McShane 13:35:59 07/22/12 (0)

RE: I am shocked! - drlowmu 18:05:55 07/21/12 (2)

RE: I am shocked! - jedrider 18:42:34 07/21/12 (1)

Lift a LEG !!!@!!!!@!!! - drlowmu 18:52:31 07/21/12 (0)

RE: I am shocked! - Chris O 17:12:17 07/21/12 (5)

RE: I am shocked! - Jim McShane 11:26:39 07/22/12 (4)

RE: "a 1 watt film resistor should do quite well" - 1973shovel 12:29:16 07/22/12 (3)

RE: "a 1 watt film resistor should do quite well" - TimFox 12:30:37 07/26/12 (0)

RE: "a 1 watt film resistor should do quite well" - Jim McShane 13:35:08 07/22/12 (1)

RE: "Put a scope probe on the cathode pin of the power tube " - 1973shovel 13:59:03 07/22/12 (0)

Follow Ups

Follow-up! - jedrider 11:32:59 08/13/12 (0)

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