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For Sale: Compact Tube Hybrid CTH - failed build for experienced DIYers only

post #1 of 3
Thread Starter 
£45 (GBP) or Best Offer
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For Sale:
Compact Tube Hybrid CTH - failed build for experienced DIYers only

Will Ship To: UK/EU preferred

Many Christmases ago (Definitely not the last three) I received a CTH kit from a well informed relative. I finished the build with everything checking out as it should along the way, powered it up without a tube and briefly got the green light then - BANG! One of the transistors blew. A quick check revealed I had two polar caps the wrong way round, they were bulging so I replaced them along with the transistor. It blew again.

I checked everything and tried to ask in the support thread but I'm not an experienced DIYer and this is a very hard build to debug due to the compact PCB and I was doing damage trying to remove things (see closeup of the underside with legs soldered together due to damaged pads) so I gave up and bought a finished one which I've been using ever since. This has just been sitting in a box in my cupboard.

In my checking I damaged the small coil (it's hot glue'd in place) and looking at it now I remember trimming the legs of the black gate cap and the one next to it too short so I had to solder extensions. Both should probably be replaced.

So you get everything pictured - the nearly complete rev 1.1 PCB, a case with solid and mesh tops, two sets of metal end plates (the pre-cut ones use a mini jacks so you might want to make your own with RCAs and a 6.5mm out) some Russian paper in oil caps and two tubes which I believe are new. The case and endplates are not perfect (the endplates were stored with the loose bits and the case wasn't put away) but nothing too bad - feel free to ask for more pics.

To finish the build I think you'll need a supply of transistors to fit 2QP, a coil L1H, and capacitors C5P and C3H along with a lot of patience and skill, but I cannot guarantee there isn't more damage. There are no burnt looking components and no bad smell... Oh, and you'll need a 24v 1A AC wallwart PSU to actually use it.

I'm hoping for £70 £60 £50 £45 but feel free to make an offer of cash or gear - anything is better than a box cluttering my room, but I'm not going to give it away. Any questions don't hesitate to ask smily_headphones1.gif
Edited by suicidal_orange - 11/14/13 at 12:13am
post #2 of 3

What's a Wallwart ?

post #3 of 3
Thread Starter 
Quote:
Originally Posted by psygeist View Post
 

What's a Wallwart ?


Sorry, that's slang for a big ugly plug that converts mains power to a lesser voltage, in this case 24 volts.  You could use a good (expensive) power supply but the amp has built in regulators so it's not necessary.

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