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Just last week, I noticed a whining noise coming from the cab when the green channel was selected. Further, after screwing around with pre-amp tubes and settings I got the whining to stop when the...

What exactly are the mechanics behind the 2 different inputs on the front of the amp? I know they sound drastically different, but what is going on inside the amp to cause this difference?

I have a 100 c/l and it has more than enough gain on tap to do any type of music. In fact, I don't like putting the gain above 1 o'clock because I think it gets too saturated.

I have never heard...

Yeah, seriously. Would have never guessed it myself. It just has this extra gain now. If I set the gain to noon before, it would be lacking and thin. Now it fattens up at noon just like it will at 2...

I put them right at 42mA. They were right at 38 before. I couldn't believe how much of a difference those few mA made either, but it did. Now there are sick amounts of gain even with the gain only at...

I biased the existing ones. I have only used the Ruby EL34BSTR tubes. From what I have heard with this amp, there is no reason to change from stock.

Well, the past year or so my 100/CL has not been sounding the same as when I brought it home from the store. I had it sounding pretty good recently but it was missing something.

Last night I...

I have been rocking on my 100 CL in the chicagoland area for the last 3 or 4 years. I have only seen one band, about 5 years ago, with an UL. Other than that, people just don't know about VHT over...

Yes, preamp tubes do go bad. In fact, I have already had to replace all of my preamp tubes since I have owned the amp.

I believe the Chinese 12AX7s do have more gain than the WB. From what I...

I just wanted to re-post this thread put on the board by rbone100. I have been searching for this information for a long time on these boards. It gives detailed descriptions of the gain stages and...

Try searching through this thread, there is a lot of useful information.

http://www.vhtusers.com/forums/showthread.php?t=236&highlight=bias+rite

Just biased my amp yesterday with my brand new matched quartet of Ruby BSTR's. Biased for 70% plate dissipation.

For a plate voltage of 450V I biased right at the 39 mA point. The amp never...

You're right, I heard that from another fellow VHT user. Thanks for clearing that up for me. I didn't think it sounded correct myself.

I have heard that Mr. Fryette considers El34's as a 30 w tube.

I have a 100-CL and I am looking to hear what the rest of you bias your El34 tubes as. Do you bias as a 25 w or 30 w tube?

I know...

I have my chasis out and the tubes plugged in while I am adjusting the bias on the amp.

When I turn the bias pot clockwise, the bias goes down. When I turn it counterclockwise it goes up. This...

It was most likely burn in as I did not do that. I just popped them in and played.

Well, I have my brand new matched pair so I will make sure that I go through the burn in step this time around.

I have it. If you would like me to forward it on to you send me a pm with your email address.

Actually I am good now. I ordered a new quartet of matched tubes from Doug's tubes since he is the only person that seems to carry Ruby B-Str's for a reasonable price.

He explained that when the...

I am just trying to get a straight answer from someone.

I have already measured the plate voltage and it sits at 440 v.

I measured the current bias setting and it is at 55 mA which according to...

So, what could the adverse effects be of me running the tubes this hot for the last year?

So then this is normal behavior? I was previously not knowledgeable about bias so I just stuck the tubes...

Ok all. I have a 100-CL and I am trying to set the bias on my amp. I checked it last night and the bias reads at approx 54 mA which seems extremely high. This amp was bought brand new so I have no...

I have a questions for those knowledgeable about biasing a 100-CL.

What is the normal Bias setting in mA for the El-34 tubes?

I am going to get a matched pair of tubes, and I wanted to know...

http://vhtusers.com/documents/G50CL_functions.pdf

Line out you could go right into a board with.

Preamp out is for just using the preamp section of the amp to run through another poweramp.
...

Ahhhhhhhhhhhh. Always good to support a shop that has done good for you. Unfortunately, I was able to secure both the 100/cl and the fatbottom cab with a 15 month interest free payment plan through...

You know you could probably mail order from Musician's Friend. They also carry VHT Gear.

That seems like an awefully long wait. You would figure in Denver you would be able to locate some VHT...