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Post pics of your builds.... - Page 8

post #106 of 9609
doosik , as i yet said your full size ppas have an *outstanding* look
..I'd really love you to say something to know what you think about their tonal behavior , when you come comparing them with other amps - other term of comparison you can recall in mind..
post #107 of 9609
Well, it's not nearly as pretty an amp as Doobooloo's but here's a thread for my new PIMETA:

http://www5.head-fi.org/forums/showthread.php?t=93324
post #108 of 9609
Pimeta Version 1.1A in a Translucent Serpac H series case with a Switched ALPS pot and some Black Gates NonPolars just for kicks.

Edit: pics removed
post #109 of 9609
doo, i've seen your progress of that case work for your amps. The look absolutely gorgeous!
post #110 of 9609
Doob, what guage of silver wire is that?

j- thanks
post #111 of 9609
double post :|
post #112 of 9609
Thanks for all your kind comments!

Quote:
Doob, what guage of silver wire is that?
The wires are 22AWG with clear teflon sleeve.
post #113 of 9609
Here's what I've been working on recently...a TDA1541A based DAC.



Closeup of the output buffer for the DAC:



Power supply regulator (Jung superregs):

post #114 of 9609
Nice.. Should be a NOS DAC i guess? I'm thinking of building a similar DAC soon. Should be using the CD8412/ 8414 with TDA1543 unless I can get hold of the TDA1541A chip. Probably throw in a reclocking circuit (either Tent XO or Kwak Clock 7) to reduce/ remove jitter as well.
post #115 of 9609
Quote:
Originally Posted by Dreamslacker
Nice.. Should be a NOS DAC i guess? I'm thinking of building a similar DAC soon. Should be using the CD8412/ 8414 with TDA1543 unless I can get hold of the TDA1541A chip. Probably throw in a reclocking circuit (either Tent XO or Kwak Clock 7) to reduce/ remove jitter as well.
I've got a spare 1541A if you want it -- I'm planning on building a Kwak Clock 7 as well. Parts are on the way, though it might take a while for me to get to building it.
post #116 of 9609
Quote:
Originally Posted by strohmie
I've got a spare 1541A if you want it -- I'm planning on building a Kwak Clock 7 as well. Parts are on the way, though it might take a while for me to get to building it.
That's cool. If it's still available when I'm finally free to start on the DAC project, I'll buy it off you. Thanks for the offer. Good luck on your project.

BTW, what are those red resistors?
post #117 of 9609


argh. so frustrating. waiting for parts to arrive or come in to stock.

pimeta, without pot (ahem robzy), and c4 (taking rs ages to get in to stock).

mint (opa2107), sans pot.

filters, without transistors (in the mail)

psu's, without transformers (waiting til im not lazy and go out to get some )
post #118 of 9609
Skyskraper, could you post links to the schematics of the filters and PSUs? They look interesting


/U.
post #119 of 9609
no probs.

+/- dc psu
steiner synthacon voltage control filter
my panel layout for filter in 1ru case

with the vcf's ive hand matched the parts on both boards to be identical, and will be handmatching transistors too, so hopefully i can get a stereo operating unit. ive been told it is still VERY hard to get them to work identically as a stereo pair. so im prepared for it to not work out and just be mono. used panasonic m electrolytics, avx caps, opa227's (on loan til i buy some nice single channel opamps of my own). i'll be using alpha 9mm sealed pots for both cheapness and because their feel is what i am looking for, great pot for little money. toying with lm3915 circuits atm

the psu's just use lelon electrolytics, standard 78/79 series regulators to give up to +/-15v.

here's hoping this project works out as i planned if i am not happy with the stereo operation i'll put the second one in a hammond desktop console enclosure for taking with me to gigs. i basically got these pcb's to somewhat give the functionality of the filters on the allen and heath dj mixers. the rack one will live in the rack in my dj studio, the desktop one will be for taking with us to gigs
post #120 of 9609
oh a couple of notes on how i am setting up the filter. instead of manually patching in signals with leads, i am using toggle switches to feed the signal in to the circuit, and the bypass switch will be another toggle to hard bypass the signal through to the main output. i have an aux out that is permanently bypassed for daisy chaining the filter in an fx rack. once i figure out a good xfader circuit for rotary pots (im assuming they work on the same principles as balance pots) i will probably ditch the rotary switch on the right for input selection and implement a wet/dry control one step at a time though

future plans for it would include, perfecting stereo performance, integrated phono pre amp, and a head amp. so it would be a complete pre mixer unit for dj'ing with
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