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Handwired Chubby KT-88 Clementine

PostPosted: Sat Sep 30, 2017 11:41 am
by TomMcNally
A friend designed this and I built it, turret boards and a nice aluminum top plate. All high end parts, sounds really good. I have a few more things to do. Woodworking is not my forte ! I was going to do a better sanding job but got a big splinter in my thumb that changed my mind. :'( I had to pull it out with pliers. The good thing is it worked first time. That hole in the front will get a pot eventually. The KT-88 socket screws need to be countersunk (easier said than done) No one but us can see the stain error in the back. lol
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Re: Handwired Chubby KT-88 Clementine

PostPosted: Sat Sep 30, 2017 12:00 pm
by Geek
Sexy! That black and natural, she has her evening dress on :))

Re: Handwired Chubby KT-88 Clementine

PostPosted: Wed Oct 11, 2017 9:39 pm
by maxdd
@TomMcNally did you glue & screw the box frame? If not, unscrew and flip around that front piece so the attenuator can mount on the preamp side (y) I'm a friend of Nick's and glad to see this amp finally built and in good hands... looks awesome! What speakers are you using with it?

Re: Handwired Chubby KT-88 Clementine

PostPosted: Thu Oct 12, 2017 9:14 am
by TomMcNally
Hi maxdd !

I'll take another look at it. I made a frame of aluminum channel and bolted the top plate top it, then screwed the channel to the wood. The plate is also upside down from the way the artist intended. Not sure how hard it would be to change at this point. The amp sounds great and Nick did a great job. I assume you helped ?

thanks

... tom

Re: Handwired Chubby KT-88 Clementine

PostPosted: Wed Nov 08, 2017 10:30 pm
by cddeluca
hi Tom
your layouts are always so clean. all i can ever manage is a right mess.
those ps caps seem pretty big - what's their rating?

Re: Handwired Chubby KT-88 Clementine

PostPosted: Thu Nov 09, 2017 1:46 pm
by TomMcNally
Those are Mundorf TubeCaps, 100 mfd at 550 volt. The designer of this amp (not me) went for the best of everything.

... tom

Re: Handwired Chubby KT-88 Clementine

PostPosted: Sat Mar 20, 2021 11:08 am
by jukingeo
Beautiful amplifier, Tom!

I have been away from the forums for a while, but came back to resume where I had left off with my amplifier projects. I have come back to find quite a few changes around here. First, Shannon isn't offering his PCB's anymore and frankly I have not seen recent posts from him. Further, I am not even sure if you will get this message as it seems the last ones I have seen from you were around 2017 / 2018. However, I have been to your website and you are still making amplifiers with the last one posted from 2020. So I am glad to see that you are still working on amplifiers.

Coming back to finish what I have started years ago, I have come to the point where I am populating a Clementine board for testing purposes of a Darling and a Chubby variant. I would have a separate board for each, but since Mr. Parks isn't making any more boards, I am going to have to work with the one. I have noticed that there are only a few part differences save for larger caps on the Chubby. So I am going to go per values for the Chubby variant and then just change out what I need for the Darling.

Given that you have build a great many Clementine amplifiers, I am curious to the parts types and brands that you have used for your capacitors and resistors. Particularly those in the signal chain. I am curious to know which brands / types that show good sonic performance and where. I know this seems to affect capacitors more than resistors, but again, you are the expert here given that you have built a great number of these amplifiers.

Any information would be appreciated.

Thank you,
Geo