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A Very Compact Hybrid Amp - Page 33

post #481 of 2213
Quote:
Originally Posted by nux View Post
Which 1/4" jacks are recommended from Mouser? And if using them, is the larger case the best option?
What runeight said WRT BoM. I have doubts about fitting a "nice" 1/4" jack in the std case, but perhaps if its mounted higher than the hole guide.... If you are gunning for RCAs + 1/4" jack + maybe minis you are most likely out of the target case & might as well do a bigger pot. Just my opinion.

BTW, if doing metal end plates probably best that no jacks, etc ground to case & we know OG must float/be insulated on outputs... Only that single SG ground wire should electrically connect to case. If so consider this 1/4 jack as its insulated & can switch out another output and maybe these insulated minis.
post #482 of 2213
Quote:
Originally Posted by runeight View Post
... We also increased R18 to 100R instead of 56R because the prototype group seems to like this value a little better. But this is builder choice.
There's room to squeeze sip sockets in for R18, that's what I did, then you're free to tune the resistance to your needs/phones...
post #483 of 2213
Quote:
Originally Posted by nux View Post
Which 1/4" jacks are recommended from Mouser? And if using them, is the larger case the best option?

And are there any other recommended tweaks or different components that I should get to try out? Different caps/knobs etc? Really want to make sure I get everything I need in one go.

Cheers.
I used the Neutrik locking type for the first time, and I'm not sure how I feel about it. It works fine - it's just big. I have also used their M Series, and those work fine. As far as room goes, I'd go with a longer case if you can. Here's a picture or two from my build to give you an idea.
LL
LL
post #484 of 2213
Get couple resistors for R18
I would recommend KOA SPR2 and SPR5 carbon film resistors, they say its same as Kiwame's. I like 47ohms.

Get some wima caps MKP & others, along with the recommended cap. Verify they fit on the board.

Get sockets, with small and large input/hole sizes some caps have larger diameter legs, also Kiwame's might have larger diameter then the rest of the resistors.

I like the original bom for R15 - 33.2k & R14 - 1M. Though its not recommended. It takes longer for e12 to trip, but I think I like the sound that way or it can be my imagination; hard to tell sometimes.



Quote:
Originally Posted by nux View Post
I've just about finished putting together a Mouser order (over US$400 currently!) and just have a few final questions for the prototypers.

Which 1/4" jacks are recommended from Mouser? And if using them, is the larger case the best option?

And are there any other recommended tweaks or different components that I should get to try out? Different caps/knobs etc? Really want to make sure I get everything I need in one go.

Cheers.
post #485 of 2213
Quote:
Originally Posted by TimJo View Post
I used the Neutrik locking type for the first time, and I'm not sure how I feel about it.
I know how I feel about 'em - poop! I love the looks though. I remove the locking spring - still very positive contact, and great aesthetics...
post #486 of 2213
we have almost 10 pairs spoken for in the group buy for the 6N1P-EV here...

I will keep this open for one more day and then close it.please PM me if you want to get in on this.

Group buy here

I have added a disclaimer....please read..These Russian dealers are known to be pretty good with the stock of tubes that they carry..but you never know.
post #487 of 2213
How does the CTH compare to the millet max, and does it drive hd650 well?
post #488 of 2213
can't comment on the mille max. It drives the HD650 quite well. A few of the proto builders own the headphones. It drives my 600 ohm Sextett just fine, as well. It drives my harder to drive K271S headphones fine as well.
post #489 of 2213
Quote:
Originally Posted by Halvor View Post
How does the CTH compare to the millet max, and does it drive hd650 well?
A much wider selection of tubes to roll and no adjustments to make when tube rolling other than a simple on/off heater switch was what convinced me to build one of the proto CTH amps.

Drives my HD600 very well, same with MS-1 and DT770.
post #490 of 2213
How is the difference in SQ?
post #491 of 2213
Drives my 650's with authority. Grado Rs-1s and Orthos as well... Denon D-5000's too...
post #492 of 2213
It drives my DT880's and AKG 701's with no problems - power to burn...

I own several Max's and love them. In terms of comparisons, all I can say is they are very different. The Max is more of a stationary desktop amp in my book, whereas the CTH is incredibly portable. The Max uses the 12 volt car radio tubes, whereas the CTH uses a whole slew of high voltage tubes, with no adjustments for biasing - kind of a plug and play design - which is very nice. With the Max, there are multiple configurations that can be built simply by choosing different combination's of transistors and caps, whereas the CTH changes sound signatures by rolling tubes. After a few solid weeks of listening to my CTH, I'm beginning to think that using BOM components is all that is needed - upgrading caps will probably have a less significant effect than upgrading tubes. At this point, if I were to build another one, I'd probably just use WIMA's as coupling caps, and invest the savings into more tubes.
post #493 of 2213
I'm with you on the Cap issue TimJo. I bought some WIMA's when I had to do another order with Mouser, and and it sounds very nice. Whether there is any difference between them and the BOM caps is debatable. I socketed the C4's so I can try the Sonicaps that I got from CFcubed in the mini group buy, but not sure I want to mess with it now.. Maybe when i build a second one, and can do some side by side A/B comparisons. I just got a 6DJ8, since CF was raving about them..
post #494 of 2213
Just looking at the posts so far, the CTH seems to be able to drive all the usual suspects very well: HD600 and 650, DT770 and 880, RS-1, MS-1, K271S, Sextett, K601 and K701 and D-5000's
post #495 of 2213
Quote:
Originally Posted by Halvor View Post
How does the CTH compare to the millet max, and does it drive hd650 well?
Hmmm...the Millet Max is so so when compared to other hybrids..but I would love to do a head to head with the Max Millet..The last time I heard one, I thought it was dull sounding. There are much better hybrid designs out there.

Hey but you listen to what ever gets you going..

Regarding whether it would drive the HD650..no problems there..The CTH drivers all my headphones which are orthos wonderfully...I have tried my 32 ohm SFI pickering, 50 ohm Fostex T50Rps, and 150 ohms Yamaha HP2 and YH-100s..and as you know orthos need a lot of juice to sing in a matter of speaking...
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