Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Instruments and Amps Everything that makes music, Especially including instrument amps.

Small guitar amp with 6JC5/6JB5 tube.
Small guitar amp with 6JC5/6JB5 tube.
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 23rd November 2009, 08:47 PM   #1
davorin is offline davorin  Croatia
diyAudio Member
 
Join Date: Aug 2005
Location: Zadar, Croatia
Wink Small guitar amp with 6JC5/6JB5 tube.

Just finished 2 small amp (Fender-Champ variation) with 6N2P-EV (good, cheep Russian military tube; similar with ECC83/12AX7), and 6JC5/6JB5 (Compactron beam pentode for vertical-deflection; "6V6 on steroids!"). Output power is >6W with clear, balance, harmonic and rich sound, much better than amps with 6V6GT in output.
Ua-k is cca.270-280V with Ia~50-55mA, and output transformer primary impedance is Ra=5200 Ohms.
Attached Images
File Type: jpg 006a1.jpg (179.1 KB, 474 views)
  Reply With Quote
Old 23rd November 2009, 08:51 PM   #2
davorin is offline davorin  Croatia
diyAudio Member
 
Join Date: Aug 2005
Location: Zadar, Croatia
More pictures!
Attached Images
File Type: jpg 010a1.JPG (177.9 KB, 426 views)
  Reply With Quote
Old 23rd November 2009, 09:39 PM   #3
davorin is offline davorin  Croatia
diyAudio Member
 
Join Date: Aug 2005
Location: Zadar, Croatia
One more!
Attached Images
File Type: jpg 013a1.JPG (178.5 KB, 391 views)
  Reply With Quote
Old 23rd November 2009, 10:14 PM   #4
Cassiel is offline Cassiel  Libya
Account disabled at member's request
 
Join Date: Sep 2004
Location: Madrid
Quote:
much better than amps with 6V6GT in output.
I really doubt that, a little better would have passed unnoticed but 6v6 are just too good to be beaten badly.
  Reply With Quote
Old 24th November 2009, 04:52 AM   #5
davorin is offline davorin  Croatia
diyAudio Member
 
Join Date: Aug 2005
Location: Zadar, Croatia
Chassis are prepared to build in 1x12" box (like "Fender-Narrow panel-Champ").
6V6 is good tube, but 6JC5 (Pa=19W) and 6JB5 (Pa=15W) have much more clean power with the same tonal characteristics.
Attached Images
File Type: jpg 008-a1.JPG (279.8 KB, 357 views)
  Reply With Quote
Old 26th November 2009, 05:34 PM   #6
Pckid212 is offline Pckid212  United States
diyAudio Member
 
Join Date: Nov 2009
Location: McDonald, PA
Looking good. How does it sound?
  Reply With Quote
Old 26th November 2009, 09:18 PM   #7
davorin is offline davorin  Croatia
diyAudio Member
 
Join Date: Aug 2005
Location: Zadar, Croatia
Very good clean sound, crunch after position volume at 8, and little fuzzy at all controls at maximum. Little more power with RCA (also ZENITH) tube, but little better sound with SYLVANIA output tube. At this moment I have only boxes with CELESTION speakers (4x12":VINTAGE-30, 4x10":VINTAGE-10, 1x12:G12H), but I have 2 speakers OXFORD-12K5-6 for the final version (boxes for combos are not finished yet).
  Reply With Quote
Old 13th March 2010, 05:10 AM   #8
davorin is offline davorin  Croatia
diyAudio Member
 
Join Date: Aug 2005
Location: Zadar, Croatia
Finally look of "Champ"-s (box is 20"x16"9,5"):
Attached Images
File Type: jpg 006 (2)a.JPG (167.4 KB, 256 views)
File Type: jpg 025a.JPG (169.3 KB, 45 views)
File Type: jpg 028b.JPG (162.7 KB, 46 views)
  Reply With Quote
Old 14th March 2010, 05:55 PM   #9
davorin is offline davorin  Croatia
diyAudio Member
 
Join Date: Aug 2005
Location: Zadar, Croatia
Box at beginning, and back side of finished amp (variation with black tolex and old "Oxford"-12" speaker-from 1972.year!).
Attached Images
File Type: jpg 004a.JPG (165.4 KB, 37 views)
File Type: jpg 006a.JPG (150.6 KB, 44 views)
  Reply With Quote
Old 14th March 2010, 07:56 PM   #10
Glowbug is offline Glowbug  United States
diyAudio Member
 
Glowbug's Avatar
 
Join Date: Feb 2006
Location: Hillsborough, NC
Pretty cool
__________________
Jim
The machine does not isolate us from the great problems of nature but plunges us more deeply into them. - Antoine de Saint-Exupéry
  Reply With Quote

Reply


Small guitar amp with 6JC5/6JB5 tube.Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
small preamp design for a bass guitar Gene_Johnson Instruments and Amps 42 25th November 2009 04:12 PM
Favorite Practice/small group guitar amp N9VOC Chip Amps 5 1st February 2008 01:42 AM
Firefly, small guitar amp (partial kit) Astera Instruments and Amps 1 13th September 2007 04:02 PM
Help With Small Guitar Amp?? lgehrig4 Instruments and Amps 2 10th October 2005 06:10 PM
Tube guitar amp sangram Instruments and Amps 6 2nd March 2003 03:54 PM


New To Site? Need Help?

All times are GMT. The time now is 05:03 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki