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A Very Compact Hybrid Amp - Page 18

post #256 of 2213
Argh, all these photos are making me jealous. I've so got to get my hands on a tube amp.
post #257 of 2213
Quote:
Originally Posted by wiatrob View Post
Welcome back - Very nice build! I'm now in the process of 'finishing' my amp up. I cobbled together some end panels from some hardwood scraps I had bought off Fleabay a while back... Blurry on purpose 'til I get it finished...


It looks like you and I have the same idea for the front panel placement... different from cf's "backwards" front panel

Dont worry CF, its ok to be different even if your wires are longer.
post #258 of 2213
Quote:
Originally Posted by HeadphoneAddict View Post
Nice, a little naamanf did rub off on you. I hope you washed your hands though! j/k
Thank's Larry. I have a bit of work to do before I can catch up with his craft - it was inspirational!

I also replaced C4L/R with some pre-loved Wimas - I have some .22 100V VitQs but they'd be a real squeeze, and it sounds great anyway!
post #259 of 2213
Quote:
Originally Posted by nsx_23 View Post
Argh, all these photos are making me jealous. I've so got to get my hands on a tube amp.
Why, Yes, you do! and this is an awesome one to start with...
post #260 of 2213
Right, so the BOM is confirmed, and I'm assuming PCBs can now be ordered?

If I can get everything from an Australian electronics store without being charged a ridiculous amount of money, I'll build this. Tubes will be an issue though...
post #261 of 2213
Quote:
Originally Posted by forsakenrider View Post
That is a darn nice knob the cf. I need to find me a nice lil' knobber. If your done does that mean you got the new caps in there? or did they even come yet (I forget).
I posted the Mouser # for the knob somewhere... It's a 1/4"er w/heatshrink to do the alps 6mm. Note: I had to trim the BoM pot shaft - its a bit long, perhaps we can get by w/the shorter shaft alps pot...

forsakenrider - Yes, the Sonicap Gen IIs are tombstoned in (Edit - perhaps not a good idea - PM for details). And all your goods will be in the mail to you within the next day or two. Maybe if I focus closely I can hear improvement w/them in C4s but wouldn't bet on it in an A/B comp... Makes me feel better though Regardless, love the sound & love it even more when rolling some tubes I dismissed in SOHA in this.

wiatrob - Those end panels are looking great! Tubes do deserve & look best w/a bit of wood IMO. BTW know my front panel is reversed.. Let's call it a lefty version

nsx_23 - If things go well across the proto group something may happen WRT bundling... As someone who bought a glassjaraudio kit in the past, sure is nice getting everything in one box... Esp. for non-US folks I bet.
post #262 of 2213
Quote:
Originally Posted by nsx_23 View Post
Right, so the BOM is confirmed, and I'm assuming PCBs can now be ordered?

If I can get everything from an Australian electronics store without being charged a ridiculous amount of money, I'll build this. Tubes will be an issue though...

We still have a few proto builds to complete as CFcubed implied- so I don't think there's an ETA on production boards -


I get tubes from Ebay, I checked Ebay.au - not a whole lot there now but if you keep your eyes open I'm sure you can score a 12au7, 5963, or such for <$10 (us)...

If you can't PM me if you build the amp and I'll see what's kicking around the tube box...
post #263 of 2213
I'm still waiting for the proto board to arrive(and the Mouser order, since I used USPS instead of FedEX). Wiatrob was in the second phase of prototyper's and a few other people have theirs in the works. I guess I'll have to put some extra spit into mine, since they're saving the best for last.. :P

I stopped at a local electronics store this morning and they had the Hammond case specified in the BOM and my first reaction was "Holy Crap that thing is small.." Have any of the phase 2 guys tried putting RCA's on the back of the box? I know a few of us ordered the 1455K1602's for a bit more room..
post #264 of 2213
There might be room for RCAs provided they are not very deep - be aware that they will be in close proximity to the switching PS if they are mounted on the back of the case...
post #265 of 2213
Quote:
Originally Posted by wiatrob View Post
There might be room for RCAs provided they are not very deep - be aware that they will be in close proximity to the switching PS if they are mounted on the back of the case...
Hmm.. I don't like the sound of that at all.. May have to rethink my idea..
or put the rca's on the front ...
post #266 of 2213
Quote:
Originally Posted by MrSlim View Post
Hmm.. I don't like the sound of that at all.. May have to rethink my idea.. or put the rca's on the front ...
Since you'll be using shielded wire for all input runs perhaps not as "bad" as it may seem from the SMPS perspective. Note also we're using a 150kHz part - audible resonances would appear very unlikely...
BUT the back is also where the A/C comes in & that's another story
post #267 of 2213
:O Just to look at those finished AMP, I love it already

Since it's near the end of proto phase, may I have a little request?
I was checking for the parts availability from local shops; only two parts that I couldn't find
were the two CRD 1N5313 and 1N5305. They seem to be difficult finds as even digikey does
not carry one.
Would you possible to provide some alternative circuits as in the SOHA CCS
(I couldn't find LND150, so I used J113 instead).
It's no need to change in PCB design just for someone who's willing to build them on
small daughter boards and piggyback 'em on the main PCB.

That'll be a great help.

Cheers,
post #268 of 2213
Quote:
Originally Posted by cfcubed View Post
nsx_23 - If things go well across the proto group something may happen WRT bundling... As someone who bought a glassjaraudio kit in the past, sure is nice getting everything in one box... Esp. for non-US folks I bet.
Yeah, I'll kill for a kit, especially since my casework is shoddy as hell. I'm not so worried about the circuit construction, more the caseworking.
post #269 of 2213
Quote:
Originally Posted by nsx_23 View Post
Right, so the BOM is confirmed, and I'm assuming PCBs can now be ordered?

If I can get everything from an Australian electronics store without being charged a ridiculous amount of money, I'll build this. Tubes will be an issue though...
This may help. Directory of Australian Valve Suppliers Not a complete list by any means and biased towards Radio valves but several mention 12AU7's.

Also any local Music Store that sells Guitar amps may have spare 12AU7 & 6DJ8 tubes as well. Local sellers will usually be expensive though(They had to ship them from somewhere)

E-bay from the USA is still your best bet. I received 5 X 12AU7's Monday that cost me less than $6 AU per tube inc shipping.
Look for sellers that test their tubes and list the test results/values rather than just saying tested good.
post #270 of 2213
Who's a good seller though?

I have never owned/built anything with tubes yet.
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