Tubeworks Mosvalve

[metalchurch79]

This is offered for sale locally, and I'm trying to find info on it, but I cant seem to find any.


Can anyone identify this, and give an approx. year and specs?
It looks to me like a tube preamped SS power head, but it might be all tubed?
The owner says he replaced 4 tubes but didnt say what size they were or what kind.

Thanks for any help you guys can give me.

[metalchurch79]

Here's a bigger pic:
edit: he did say it was 100w, but that's all i know

[metalchurch79]

I found out that the company was bought out by Genz Benz, and I went on their site, found manuals for the old Tubeworks products, but nothing for the RT2100R. There was a manual for the RT2100 combo amp, maybe the rackmount version is similar?
I just thought I'd post here to see if anyone was familiar with this product or not.
I might shoot an email to Genz Benz to see if they can help.

http://www.genzbenz.com/?fa=manuals

[toejam]

I seem to recall seeing them in magazines back in the late '80s and early '90s, but don't really know too much about them.
Here's some reviews on Harmony Central.

http://reviews.harmony-central.com/reviews/Guitar+Amp/brand/Tube+Works

[slash]

I have a power amp which I like. I don't know anything about the one in your picture though. My guess is that yours has a tube preamp with a solid state power amp

[metalchurch79]

I was thinking the same thing, that it has a tube pre and an SS power section.
Someone told me today that the pdf file on the GenzBenz site for the RT2100 combo is the same one for this RT2100R. The "R" meaning rackmounted version.
Not sure if it's the case or not, but it would make sense for the missing pdf file. The RT2100 combo has 4-6L6's, so that would take the Solid State theory away.
I'm waiting for a reply from GenzBenz, and also I'm setting up a time to check it out in person.
I'll post any info that I find for everyone to have just in case.
Being there's a lack of info make me want it even more. I like having odd shit in my rigs for some reason. I guess I like being unique.
Thanks for the help guys.

[toejam]

According to the first review posted on HC, here's what it says...

"This is a hybrid amp with a tube preamp, FET power amp"

http://reviews.harmony-central.com/reviews/Guitar+Amp/product/Tube+Works/RT-2100R+Head/10/1

[metalchurch79]

That was some good reading, thanks Joe! It appears to be a 2 channel head with two 12AX7's per side, and a SS power section.
The seller said that he replaced 4 tubes, so it must have been the 12AX7's cause he said nothing about biasing and 12AX7's dont require it.

Slash, could you please give me your thoughts on your Tubeworks, and what features you like and dislike about yours?
Thanks guys!

[OnlineStageGear]

MOSVALVE means it has mosfet transistors for output (Solid State) and valves (Tubes) for a pre-amp. The Mosfet transistors will give you a little warmer sound than a standard transistor amplifier.

[metalchurch79]

Thank you for that tid bit. I was wondering what "Mosfet" was. I've heard that word being used by someone else today also.

[chrisolson]

Sounds quite similar to the Marshall Valvestate and ADA MicroTube series of poweramps. Better than SS, but still not quite tube.

[metalchurch79]

Yeah the construction does remind me of the old Valvestates in a way. This has to be one of the first amps in the era of tube/valve technology. I haven't heard anything new from the seller, or from GenzBenz, but i did find another picture that he had posted:

Still no picture of the back of this yet.
Thanks for all of the help so far.

[jgcable]

Make sure you get it cheap. Its decent but an SS poweramp for guitar is really only suitable for home use and small jams. It can't keep up with a tube power amp.

[metalchurch79]

Yeah I'm already running a Marshall 9200 poweramp, I want to build another rack to have setup for different tones other than metal. Just lookin for a different flavor basically.
He's asking $200 obo, I'd like to hear it first before I make an offer, but I'm not gonna pay $200, cause I can get something equal or better for that price or slightly higher.

[jgcable]

Yeah I'm already running a Marshall 9200 poweramp, I want to build another rack to have setup for different tones other than metal. Just lookin for a different flavor basically.
He's asking $200 obo, I'd like to hear it first before I make an offer, but I'm not gonna pay $200, cause I can get something equal or better for that price or slightly higher.

thats a $100.00 tops power amp.