Pro Reverb Voltages

[Chuck H]

So, the "fire" thing may happen if you use carbon composition, as they are basically charcoal... But using a metal film or other ceramic-bodied 1W resistor should help avert the conflagration, no?

It's not the 60s/70s anymore - we have resistor choices now!

Justin

You just wanted to use conflagration in a sentence. A word I do actually know, but never get to use

[Justin Thomas]

Well, keep biasing your EL84s at 150% and use carbon comps for everything, and you can have your wish! And, why, yes, I <DO> have a rather expansive vocabulary... now let me see if I can use "comprise" wrong in a sentence! Somebody go get Enzo to watch...

Justin

[Chuck H]

I'll have you know I run my EL84's at a very conservative 90% @ 365Vp I don't think anyone would comprise over that.?.

[dstrat]

poor el84s, I bet they sound angry

[Justin Thomas]

I think the one thing Mr. Noise-Expert-Boy got right was something about tubes screaming for holy mercy from their sockets... sound Angry? They're screaming for their lives, and sound damn good while doing it, too!

Anyway, I'll quit. I've derailed this one enough, and we ain't in the Lobby.

Justin

[Enzo]

Somebody go get Enzo to watch...

Hey, I don't compromise on comprise.

[Justin Thomas]

That's a GOOD thing. I'm actually glad I learn more than troubleshooting here. So how about allow those references to silicone rectifiers? I could care less, irregardless.

Justin

[Chuck H]

That's a GOOD thing. I'm actually glad I learn more than troubleshooting here. So how about allow those references to silicone rectifiers? I could care less, irregardless.

Justin

Oh man! My mom uses that "word" (irregardless). My wife, who is actually more worldly than I am often calls espresso "expresso" (maybe a consequence of being on the scene in California in the 80's when the Expresso limousine service was popular there?). The thing that bugs me is that I've (in a subtle way) corrected both of them and they continue the offence. Once in a while I discover a word that I've been mispronouncing or using incorrectly. I'm actually mortified and make significant effort to not repeat the mistake. I go into a montage of my life trying to remember if there were any circumstances where I embarrassed myself too badly in front of the wrong people. That is, people who would not correct me, but judge me just the same. Maybe it's just me because it sure doesn't seem to bother my wife or my mom

P.S. It's my understanding that 'irregardless' is currently accepted as equivalent to 'regardless' by modern linguistic standards (boo, hiss!).

[Mick Bailey]

There was a lady where I used to work who said 'segregated' bread knife instead of serrated. Someone asked if it only cut white loaves but the irony was lost.

[pdf64]

...My wife, who is actually more worldly than I am often calls espresso "expresso"...

Being tea drinker, I can't recall ever saying it out loud, but I'd never noticed the difference, so thanks for pointing that out, as I find it mortifying to get things like that wrong

I think that the standard g2 current limiting resistor fitted by Fender from the late 50s through 60 and 70s was 470 ohm 1 watt CC, eg http://schems.com/schematicheaven.ne...5f8a_schem.pdf

Other than as collateral damage, eg tube short, bias failure, I've never know a 1W MF 470 ohm g2 resistor to fail in a Fender type 6L6 amp. Types with a flame retardant coating seem to pose almost no fire hazard when they do overheat.

I can envisage that the old original CC 1W 470 ohm g2 resistors drift up in value over time and their max potential dissipation may tend to increase likewise. So due to that, the heat, vibration and torsional stress, and the fire risk created when they do go, I think it good practice to replace them (ie the old tube socket mounted ones, and also the tube socket mounted 1k5 g1 stoppers) whenever feasible.

[Enzo]

Back when, there was a coffee shop about to open across the street from my shop. It was still born. Got the signs up, but never opened. I felt bad for whoever invested, but was kinda glad the place never sailed, because the name was...

Expresso Self.

[bob p]

P.S. It's my understanding that 'irregardless' is currently accepted as equivalent to 'regardless' by modern linguistic standards (boo, hiss!).

"Irregardless" has been considered to be a linguistic faux pas, because it combines a double negative into a single word. The base of the word is "regard", and then it is negated by adding the "-less" suffix to negate it. If someone adds the "ir-" prefix, that negates "regardless", which brings us right back to the meaning of "regard".

I remember being corrected on it's use once, when I used "irregardless" in lunchtime conversation with my brother in law, who seized the opportunity to correct me. Presumably everyone else let me suffer in silence.

According to Dictionary.com, the origin of the double negative was a radio cartoon in the 1930s which made it popular in common use. It had not existed prior to that time. I guess this is just another example of spending too much time paying attention to media making us look uneducated. The only difference being that in the 1930s the "boob tube" was a radio.

Irregardless is considered nonstandard because of the two negative elements ir- and -less. It was probably formed on the analogy of such words as irrespective, irrelevant, and irreparable. Those who use it, including on occasion educated speakers, may do so from a desire to add emphasis. Irregardless first appeared in the early 20th century and was perhaps popularized by its use in a comic radio program of the 1930s.

My guess is that Justin used it to add emphasis.

[bobloblaws]

...have you scoped for oscillation?

If you've not got a scope, the potential for power amp oscillation can be eliminated, without affecting the power tube operating conditions, by removing the phase splitter tube V6.

I have digital scope and have used it to look at output and other amp stages signal waveforms for troubleshooting and measuring output power etc. but that is pretty much the extent of my experience and knowledge with the scope. There are certain scope features that I'm unfamiliar with, e.g. triggering. If you don't mind straying a bit off topic, can you tell me how I would use the scope to check for oscillation, say in the context of this discussion?

[Chuck H]

https://www.google.com/search?q=%22p...w=1536&bih=779

[bobloblaws]

https://www.google.com/search?q=%22p...w=1536&bih=779

That works, thanks Chuck