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Rockwell
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question Astroverb 16
« Thread started on: Feb 29th, 2004, 1:44pm »

Does anyone here know the tube layout of the Astroverb16? Or where I might find it? I emailed Solodano a couple of days ago, and I haven't heard back yet. Also which power tubes are useable?
Thanks for any help!
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joolzriff
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xx Re: Astroverb 16
« Reply #1 on: Mar 2nd, 2004, 8:57pm »

i e mailed BOB from eurotubes.com and he said he has retubed plenty astroverbs and told me that their EL84'S are nice n tight n glassy and the rest of the amp will take the 12AX7'S......$55+$6 for shipping
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Rockwell
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xx Re: Astroverb 16
« Reply #2 on: Mar 3rd, 2004, 10:33pm »

Thanks for the reply.... grin However I know what tubes came with it, what I'm looking for is the layout.
Which socket is V1, etc. I think I figured it out though and I switched the 12AX7 that drives the reverb and replaced it with a 12AT7. I think it made an improvement. I am also trying to find out what other power tubes can be used as well.

Later................................ cool
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JetCityMatt
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xx Re: Astroverb 16
« Reply #3 on: Mar 5th, 2004, 12:53am »

The tube closest to the side of the chassis, behind the preamp pot is V1, followed by 2, 3, and V4 which is closest to the power tubes.


I bought the Astroverb effects loop prototype from Mike almost 3 years ago- I think it is 5 or 6 years old since it sat on the back shelf at the factory for 2 or 3 years. (Mike told me several months ago that they use JJs now instead of Sovteks due to quality issues... anyway, mine came with Sovteks: V1 and V2 12AX7LPS, V3 and V4 (and probably the reverb driver too) were 12AX7LP.
The LPS has a filament heater, the LP does not. Basically you can use any tube that does have the filament heater in any position you want: such as JJ, Chinese/ Groove Tubes (and every other brand too I think?).
I'm currently using the Groove Tubes 12AX7C which is simply a Chinese 9th generation tube (which has the most gain of the 12AX7s) that has been tested by GT. I really like them, but would like to try EHs and am waiting for GT to release their Mullard copy or whatever it is. I do not like the JJ preamp tubes at all, but maybe they have changed since a year and a half ago?

The power tubes are EL84s- I have JJs that I bought from Bob at Eurotubes and I like them much better than Sovtek!
« Last Edit: Mar 5th, 2004, 12:57am by JetCityMatt » User IP Logged

Fat Strat > 535Q > TU-2 > BD-2 (rythm boost) > SD-1 > Soldano Astroverb effects loop prototype head > G12H30 & V30 in Avatar G212H. DD-5 in Loop.
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xx Re: Astroverb 16
« Reply #4 on: Mar 5th, 2004, 5:28pm »

Hey Jetcitymatt,

Thanks alot!! That is what I needed to know.
Is the reverb driver V4 orV5? V5 sits towards the
very back of the amp. Are you using a 12AX7 for the reverb?
Have you ever tried a 12AT7 there? Thanks again!

grin wink cool
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xx Re: Astroverb 16
« Reply #5 on: Mar 7th, 2004, 6:04pm »

The reverb driver is the one between the two cables that plug into the PCB which come from the reverb tank. I don't think this gets a "V" number, like V5, it's just called the reverb driver I think. I still have a Sovtek 12AX7LP for the tube driver- I guess I never had any reason to replace it... I never turn the reverb past 3 anyway.

Also, V4, which is closest to the power tubes is the PI or phase inverter. Unlike the preceeding tubes where the signal comes in one side of the tube (through one of the triodes) and goes out the other side (through the other triode), each of the two triodes in the PI tube deliver their signal to each of the two tubes. I think that's right! smiley
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Fat Strat > 535Q > TU-2 > BD-2 (rythm boost) > SD-1 > Soldano Astroverb effects loop prototype head > G12H30 & V30 in Avatar G212H. DD-5 in Loop.
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