Another Express project

[pleasantbullet]

Right now with pin 5 bias voltage at -33 I'm at 50mA but I could subtract the 2.06 screen voltage an still in safe range but at end of bias pot adjustment.

What's the significance of obtaining -33v?

With my amp ,i biased my amp around -28v, and the tubes are running at 44mA.

Is it merely a novelty to have it run at -33, or does it have an effect on the sound. Is there something magical that happens?

Should a proper express run -33v bias?

[M Fowler]

rj I'm thinking it might be the fact that I replaced the .0022uf with .0033uf.

The other coupling caps are all stock values. Not sure why it is darker but I like being able to use the treble and mid controls as well as the bright switch.

Not sure why but my other Express amps are way brighter.

As far as bias just fine the sweet spot for your tubes within safe bias range.

[M Fowler]

Okay so I spent some time today playing through 3 of my Express amps and something is going on none of them are bright today. WTF.

I give up trying to understand Trainwreck's

[xtian]

none of them are bright today

Sudden ear wax buildup?

[M Fowler]

Yes I do have ear problems, tinnitus, hearing loss and multiple surgeries to left ear so not a good candidate probably for listening tester job.

One of these days I'll remodel and get my recording equipment dusted off.

[Tillydog]

none of them are bright today. WTF.

Happened to me once, too. Spent a few days swapping parts.

The part that fixed it?

New guitar strings!

[Zippy]

Someone else recently posted a similar stumper - solved by cleaning speaker connections.

"This is hard work!" - G. Bush.

[M Fowler]

I have a box full of parts for Vox AC30 clone to put together, that should be brighter.

[M Fowler]

Question for future use of this type of power cord strain relief.

Which way is the proper way to install this device like I did or the other way?

[Zippy]

none of them are bright today. WTF.

Happened to me once, too. Spent a few days swapping parts.

Whew, that first cup of coffee didn't work. I was reading down the thread and thought I read that you spent a few days swapping PANTS.

Yeah, new strings are a beautiful thing. I used to change strings at least every few days.

P.S. Mark, the strain relief is installed backwards to the common implementation. On the other hand, it should still grip well, and performs the desired function with a less obtrusive look. That is to say that it looks weird to me, but is not a "wrong" answer.

[dcribbs1412]

Whew, that first cup of coffee didn't work. I was reading down the thread and thought I read that you spent a few days swapping PANTS.

Almost spit my coffee out reading this....lol

Beautiful build(s) Mark congrats
Mark whats your verdict on the (rockingclass) iron you used?
fwiw I vote for your implementation of the strain relief.

D

[M Fowler]

So in other words there is no correct way to install?

I think the Rocking Class Pacific transformers are the same in value/workmanship/tone as other Pacific transformers I've bought from Allynmey and rjguitars.

[Zippy]

So in other words there is no correct way to install?

Well, there is a "more correct" way, but you seem to have stumbled into an "alternatively acceptable" method.

If you look at "approved installations", the gland nut is on the outside of the enclosure.

"Code? We don't need no stinkin' code."

Tube amps - the last frontier of the electronic cowboy.

[M Fowler]

Thanks