trinityamps.com

Hi
just wanted approval of first layout of TC-15
converting my TMB 18 to TC-15
any comments are welcome
and thanks in advance



http://i1018.photobucket.com/albums/af301/dcribbs1412/tc-15005.jpg

http://i1018.photobucket.com/albums/af301/dcribbs1412/tc-15001.jpg

http://i1018.photobucket.com/albums/af301/dcribbs1412/tc-15front1.jpg

Sorry this is the second layout
anybody have any comments
just wondering if anything looks wrong
thanks

Jumpers look fine; board parts look fine but cant confirm the values.

_________________
Stephen
Web: www.trinityamps.com. Facebook: facebook.com/trinityamps. Twitter: @trinityamps

Thanks for checking
I will post more pics as soon as I can
also thanks so much for the switch

some pics of the contour switch
any comments are welcome

http://i1018.photobucket.com/albums/af3 ... consw3.jpg

http://i1018.photobucket.com/albums/af3 ... consw1.jpg

http://i1018.photobucket.com/albums/af3 ... consw2.jpg

caps are .01 .0047 .0022 .0015 500pf 360pf

edit found I had 2 .0047 changed to 500pf mica will this work ok?
didnt have a .0005 cap

http://i1018.photobucket.com/albums/af3 ... swrev2.jpg

http://i1018.photobucket.com/albums/af3 ... swrev1.jpg

Happy Holidays to everyone

I'm a little confused about what you're saying....

0.0047uF is 4.7nF or 4700pF

0.0005uF is 500pF

_________________
Great tones come in small glass jars!

Sorry for the confusion
after posting 1st pics I realized I had put a 472k (cap far left) where a .0005 cap was called for
before pic:



After pic:



So caps go 360pf 500pf .001 .0022 .0047 .01
this is what I had on hand

Thanks for looking zaphod
will the silver mica make much difference from poly?

Silver mica should be fine.

FYI - http://greygum.net/sbench/sbench102/caps.html

_________________
Great tones come in small glass jars!

little more work on the conversion
got the unibit to enlarge the chassis for the 5AR4 (octal socket)

the monsta bit:
http://i1018.photobucket.com/albums/af301/dcribbs1412/tc-15013.jpg

had to move the fuse assembly out of the way but otherwise no big deal to drill out...wired 290v to pins 4 and 6...5v to pin 2...0v to pin 8 :

http://i1018.photobucket.com/albums/af301/dcribbs1412/tc-15011.jpg

remembered to use the 5v tap(yellow/white) and tie off the 6.3v(white) I used for the 6CA4(EZ81)
hope I read this right:
http://i1018.photobucket.com/albums/af301/dcribbs1412/tc-15012.jpg
http://i1018.photobucket.com/albums/af301/dcribbs1412/tc-15.jpg

again any comments are much appreciated
thanks
Have a Happy Safe New Year

had a chance to do a little more
decided to go with a 4 H choke/1K5 resistor DPDT switch...on off on
we'll see if it works out
http://i1018.photobucket.com/albums/af301/dcribbs1412/tc-15014.jpg

http://i1018.photobucket.com/albums/af301/dcribbs1412/tc-15020.jpg

set the board in to see if it fit looks good.... got some leads to run
debated about the Hall VVR(thanks Dana) I'm going to give it a shot
http://i1018.photobucket.com/albums/af301/dcribbs1412/tc-15016.jpg

Also ran new shielded cable its big but all I had on hand
as always any comments are welcomed

Got a little more done ....think I'm close firing it up...maybe fire is the wrong word...
few pics
http://i1018.photobucket.com/albums/af301/dcribbs1412/tc-15021.jpg

http://i1018.photobucket.com/albums/af301/dcribbs1412/tc-15023.jpg

http://i1018.photobucket.com/albums/af301/dcribbs1412/tc-15022.jpg

http://i1018.photobucket.com/albums/af301/dcribbs1412/tc-15026.jpg

http://i1018.photobucket.com/albums/af301/dcribbs1412/tc-15025.jpg

As always I appreciate any/all comments
please let me know if anyone spots a potential problem
I will post/check voltages as soon as possible...and I have a cold one


http://i1018.photobucket.com/albums/af301/dcribbs1412/tc-15024.jpg

Ok got some voltages
some look ok some dont
any help is appreciated
tubes installed


Pin| 1 2 3 4 5 6 7 8 9
---+---------------------------------------------
V1 | 348 -- 6.4 -- -- 348 -- 6.5 --
V2 |205 -- 0 -- -- 282 -- 205 --
V3 |353 -- 6.6 -- -- 353 -- 6.6 --
V4 | -- -- 7.8 -- -- -- 369 -- --
V5 | -- -- 7.8 -- -- -- 369 -- --
V6 | -- -- -- -- -- -- -- 389 --
V7 | 68 -- 1.6 -- -- 123 -- 1.7 --

caps measured:
226 360 343 285 360

V1 seems pretty high also V3
again any input would be appreciated
thanks

Well took another look and found some wrong resistor values
1.5m instead of 1.5k duh
none on hand ... placed order
will update when I replace

Got the 1.5k resistors and now voltages seem fairly good
amp sounds good all pots and switches seem to be working fine.Thanks Stephen another great design:D


Pin| 1 2 3 4 5 6 7 8 9
---+---------------------------------------------
V1 | 133 -- 1.3 -- -- 133 -- 1.3 --
V2 |170 -- 1.2 -- -- 268 -- 170 --
V3 |238 -- 44.9 -- -- 248 -- 46 --
V4 | -- -- 7.3 -- -- -- 359 -- --
V5 | -- -- 7.3 -- -- -- 361 -- --
V6 | -- -- -- -- -- -- -- 372 --
V7 | 68 -- 1.6 -- -- 119 -- 1.6 --

caps are 234, 315, 330, 266, 327

will be putting in cab and testing,maybe trying different tubes also
more pics to come

Some pics of the chassis in the wood
sounds good......
going to break in before any tweaks


http://i1018.photobucket.com/albums/af301/dcribbs1412/tc-15027.jpg

http://i1018.photobucket.com/albums/af301/dcribbs1412/tc-15036.jpg

http://i1018.photobucket.com/albums/af301/dcribbs1412/tc-15028.jpg

Beautiful cabs!!!!!

_________________
Deric®

Thanks
it's 3/4" mahogany from a drawer company in Phoenix
guy I did computer work for has a wood CNC machine in his shop did the detail work
I will post some sound clips as soon as I can
What to build next?

Very nice detail. I really like that!!

_________________
Stephen
Web: www.trinityamps.com. Facebook: facebook.com/trinityamps. Twitter: @trinityamps

Thanks Stephen
I was hoping to create a nice home for your chassis.
Got some NOS tubes and a few different speakers I'm going to mess with. Then record some sound clips.

channel 2 sounds really good
but I have to turn volume way up on channel 1 to get acceptable volume(a long with quite abit of hiss)
I've done searches and checked res values, pot values,continuity and
changed tubes, but I'm not sure the ef channel should have this much
difference in volume.
any help is appreciated
thanks