FS: Tubalizer - damaged. - diyAudio
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Old 27th May 2007, 06:02 PM   #1
nodiak is offline nodiak  United States
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Default FS: Tubalizer - damaged.

This Tubalizer was damaged and quit playing after i inserted a ps in reverse polarity.
After email conversation with the makers they wrote: "The only components burnt are the 2 electrolytic capacitors and the 7608 regulator."
I know nothing about the regulator, but the caps are 1000uF/25 volt.
I put it aside and never got to repairing it. I can only assume they are correct.

Sold as is with no tube (6sl7) for $25, plus shipping from zip code 95521, usa. Prefer paypal and I'll absorb fees.

Thanks, Don
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Old 27th May 2007, 06:14 PM   #2
ymwong is offline ymwong  United States
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I will take it. Please let me know the total shipped to 95070.

thanks.
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Old 27th May 2007, 08:05 PM   #3
nodiak is offline nodiak  United States
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Varies $4-6 for shipping, so $29 total works for me. If that's ok you can do paypal to: nodiak@sbcglobal.net .
Thanks, Don
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Old 27th May 2007, 08:06 PM   #4
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Default Re: FS: Tubalizer - damaged.

Quote:
Originally posted by nodiak
..... they wrote: "The only components burnt are the 2 electrolytic capacitors and the 7608 regulator."
I know nothing about the regulator, but the caps are 1000uF/25 volt.
I put it aside and never got to repairing it. I can only assume they are correct.
Should be a very easy fix if no tracks are burned. The circuit contains only cheap and common components. It also works with 6SN7.
The electrolytics don't like reverse voltage so I would expect them to be the problem.
The regulator is a commonly available part too.

What did you think of it when it was working??

I have one of these and have drawn out a schematic ........
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Old 27th May 2007, 08:34 PM   #5
nodiak is offline nodiak  United States
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Good tone, but some hum that increased with bias adjustments. Seemed to possibly be a ps compatibility problem as the unit is from Europe and I'm in usa. The ps they sent with it didn't work here at all (don't remember the problem, this was a year ago), so I tried a Radio Shack (273-1776), but I screwed up and had polarity reversed on the removeable tip. It actually played a while before dying.
When I told them about all this they said they'd discontinued selling their ps to usa customers. I dropped the project so didn't come to a definite ps solution. At least it did help me learn I may generally like octals for preamp, I collected several tubes for rolling so I liked it that much. It's a nice simple idea that I thought helped flesh my gainclone out.
Don
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Old 27th May 2007, 09:42 PM   #6
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It's good to hear other opinions since there aren't many reviews on the net. I've had no hum with any supply so far but It did clip very badly until I increased the supply voltage to get more headroom.

When replacing the caps see if you can get higher voltage equivalents in there. It would be a tight fit though! The caps (voltage) and the regulator's (heat) are the only things that limit the possible supply voltage within reason of course. I have used mine stock with 24V but obviously the 25V caps are a bit close to their limit for comfort!

I'm in the middle of taking the regulator off-board (with separate supply) and changing the caps to allow up to about 40V DC.

Best regards,
Martin.
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Old 28th May 2007, 06:09 AM   #7
ymwong is offline ymwong  United States
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Hi Don,

Please check you email for PayPal payment confirmation.

Thanks...ym
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Old 28th May 2007, 02:37 PM   #8
nodiak is offline nodiak  United States
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Default SOLD

Tubalizer has sold.
Thanks ymwong.
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Old 29th May 2007, 08:40 PM   #9
nodiak is offline nodiak  United States
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Tubalizer is on it's way, should reach you by Friday.
Thanks, Don
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