davesans Posted January 14, 2017 Share Posted January 14, 2017 Hello Everyone I thought I would share my latest project it is based around the Hagerman Clarinet. I had bought the half kit manny years ago and started putting it together then my audio quest did a U-turn and I went in another direction. I sold the circuit board but I kept the parts I bought I also started the chassis and punched the top plate. So last year I decided to get back into tube audio I bought a pair of Klipsch Forte's So I thought I start off finishing up this project seeing I had most of the parts on hand to keep the cost down the chassis in made from padauk wood. I point to point wired it and a friend of mine made me the turrent boards. I had it up and running for a few hours now and I have to say it sounds real nice I been using a passive preamp that built for a few years now and thought that it sound pretty good but this add deeper bass notes and more detail in the high frequencies I know there more burning in it has to do. Next project will be pair of mono SET amps the Maynard designed around output transformers I have in parts box. Thanks for looking Regards Dave 4 Quote Link to comment Share on other sites More sharing options...
Schu Posted January 14, 2017 Share Posted January 14, 2017 Thats nice looking... I am wondering which "pots/attenuators" you chose and why? Quote Link to comment Share on other sites More sharing options...
davesans Posted January 14, 2017 Author Share Posted January 14, 2017 42 minutes ago, Schu said: Thats nice looking... I am wondering which "pots/attenuators" you chose and why? Thanks Schu I chose to use two mono pots over stereo so I could adjust each channel separately in case there might an imbalance between left and right in the recording. There made by Precision Electronics I used them before and had good luck with them. Quote Link to comment Share on other sites More sharing options...
mike stehr Posted January 14, 2017 Share Posted January 14, 2017 Ditto! I like the tongue and groove hardwood flooring for the base. I did my RH84 amplifier in Brazillian Cherry. 2 Quote Link to comment Share on other sites More sharing options...
tube fanatic Posted January 14, 2017 Share Posted January 14, 2017 Looks beautiful Dave. Just to clarify, the 6K6 design is for pentode operation. I think you will love it! Maynard 1 Quote Link to comment Share on other sites More sharing options...
davesans Posted January 14, 2017 Author Share Posted January 14, 2017 1 hour ago, mike stehr said: Ditto! I like the tongue and groove hardwood flooring for the base. I did my RH84 amplifier in Brazillian Cherry. That is a very fine looking amp Mike nice choice of parts as well. I will look into the hardwood flooring and see if I can get small quantities. Quote Link to comment Share on other sites More sharing options...
davesans Posted January 22, 2017 Author Share Posted January 22, 2017 The preamp is starting really sound good after some burn in time. I replaced the Golden Dragon 12AU7's with a pair of RCA's that really smoothed out the top end the Golden Dragon's were rough on the highs. Quote Link to comment Share on other sites More sharing options...
mike stehr Posted January 22, 2017 Share Posted January 22, 2017 4 minutes ago, davesans said: The preamp is starting really sound good after some burn in time. I replaced the Golden Dragon 12AU7's with a pair of RCA's that really smoothed out the top end the Golden Dragon's were rough on the highs. I'm no 12AU7 expert, but it seems folks are fond of RCA 12AU7 clear-tops. 1 Quote Link to comment Share on other sites More sharing options...
Schu Posted January 22, 2017 Share Posted January 22, 2017 Bugle boys... mullard... mazda... and of course telefunken. My preference is for long plated 12au7's. Rca clear tops with long plates are good and sound really clean, but slightly dry in my setup... its your taste that counts. I run a siemens silver plate in the follower position and a early production Mullard in the output position on my pre Heaven forbid you use tube rolling to taylor the sound of your system... measure, measure, measure.. nothing else matters! 1 Quote Link to comment Share on other sites More sharing options...
davesans Posted January 22, 2017 Author Share Posted January 22, 2017 I put RCA Clear Tops I had a pair of Mullard's but I, unfortunately, broke one. Also, I learned the hard way on tube rolling. It can only a small difference in sound if any at all. Quote Link to comment Share on other sites More sharing options...
Schu Posted January 22, 2017 Share Posted January 22, 2017 You dont hear differences in different tubes? Quote Link to comment Share on other sites More sharing options...
davesans Posted January 22, 2017 Author Share Posted January 22, 2017 4 minutes ago, Schu said: You dont hear differences in different tubes? I hear a difference in tubes I just tailor the sound by tube rolling like you said. The right gear needs to be matched to speakers, amp, and so on. If the tube circuit is designed to get the most out of that tube type then rolling high dollar NOS tubes in and out is only going to make a little difference. I would think that changing the operating point would change the sound more but I am not and expert on that. Quote Link to comment Share on other sites More sharing options...
aljordan Posted April 15, 2019 Share Posted April 15, 2019 Hi Dave, Apologies for posting to an old thread. I was browsing and saw your build of the Clarinet and just wanted to comment on what a nice job you did. It looks very nice. I bought the Clarinet circuit board and parts from someone who had ordered all of the components years ago but never built the unit. I built it over this past weekend and think it sounds quite good with only a couple of days on the unit. I think yours looks much better with the wooden case and metal top. Alan Quote Link to comment Share on other sites More sharing options...
erik2A3 Posted April 18, 2019 Share Posted April 18, 2019 Davesans, Beautiful! The wood looks amazing, and I really like how you arranged tubes, power tranny and switch. I always enjoy seeing work like this. Thanks for sharing. Quote Link to comment Share on other sites More sharing options...
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