Go Back   Home > Forums > Amplifiers > Tubes / Valves

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

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 26th January 2005, 03:13 AM   #1
Coulomb is offline Coulomb  England
diyAudio Member
 
Coulomb's Avatar
 
Join Date: Jul 2002
Location: Ancaster, Ontario
Default www.diytube.com Kits

I am considering the dual Mono EICO partial kit from diytube.com this is thier blurb.

The design closely resembles the Eico HF-series which used a modified Mullard 5-20 circuit. The Eiclone (pronounced ‘eye-clone’) uses the 12AX7 as the voltage gain stage tube, as did the classic Eico HF-87 and HF-89. This gain stage DC-couples to a 6SN7 long-tail pair phase splitter driving a pair of push-pull EL34 tubes. The bias supply and grid resistors in the standard design are compatible with alternate power tubes such as 6550s and KT88s.
It is a PARTIAL kit meant for experienced tube hobbyists, and it includes:

two ultra-heavy duty PCBs with silkscreen on both sides - 50% thicker and with 100% more copper than your average PCB
new 'Rev B' design allows the experienced DIYer many undocumented options (eg 6SL7 sub for the 12AX7, CCS for the LTP, etc.)
robust 16-page manual containing: straight-forward instructions, detailed schematics, assembly artwork and templates - see here (~500k PDF)
parts list w/ Mouser.com part numbers and BOM support
email support provided
a growing community forum and tons of project pictures on diytube.com

Most parts can be purchased easily through Mouser, and vendors are suggested for the others (ie transformers, tubes, and tube sockets). This design is intended for all new construction using Hammond transformers: 274BX power transformer and 1650N outputs. Pictures showing completed projects are not indicative of auction contents. Design is to be oriented for a tube out construction.
Go to diytube.com for more info and pictures.


Anyone tried this kit or this topology?

Regards

Anthony
__________________
I like to stay current!
  Reply With Quote
Old 26th January 2005, 08:08 AM   #2
SHiFTY is offline SHiFTY  New Zealand
diyAudio Member
 
SHiFTY's Avatar
 
Join Date: Jul 2002
Location: New Zealand
Would probably work fine. You might want to use 6SL7s in the front end though, would sound better. Use KT88s for max power. Dont solder sockets to the board but run wires instead to a large chrome chassis with sockets & trannies mounted on top.

I actually wish I had seen this kit before i started point-to-point wiring- would probably have halved the time to finish my amp, not to mention made it a lot neater!

So yeah probably a good idea eh.
  Reply With Quote
Old 26th January 2005, 11:22 AM   #3
Coulomb is offline Coulomb  England
diyAudio Member
 
Coulomb's Avatar
 
Join Date: Jul 2002
Location: Ancaster, Ontario
Hello SHIFTY, Thanks for the tip on the tube selection.

Regards

Anthony
__________________
I like to stay current!
  Reply With Quote
Old 27th January 2005, 12:18 AM   #4
anatech is offline anatech  Canada
diyAudio Moderator
 
anatech's Avatar
 
Join Date: Jun 2004
Location: Georgetown, On
Hi Anthony,
I am a happy owner of an HF-87a. Uses 6SN7's, 6CA7's for outputs and 12AX7A for input. The output iron is larger than normal on a real HF-87A. (larger than other amps that power rating)

Build it and be happy.

-Chris
  Reply With Quote
Old 27th January 2005, 12:48 AM   #5
KBK is offline KBK  Canada
diyAudio Member
 
Join Date: Dec 2003
Location: The Wilds Of Canada
I need some tube amps..but I'm short on free time! Rotac used to have the 'passion' kits, which were kinda cool. They gave up on that. darn.
  Reply With Quote
Old 27th January 2005, 03:17 AM   #6
Coulomb is offline Coulomb  England
diyAudio Member
 
Coulomb's Avatar
 
Join Date: Jul 2002
Location: Ancaster, Ontario
Well I bought a pair of these boards from Shannon of tubediy.com, now I am just waiting for thier arrival. I think I am going to try the 6SL7 input as suggested. The Output Transformer is a Hammond 1650N good for 60 watts PP, I would like to investigate one of the bigger 1650 transformers as a possible replacement.

Regards

Anthony
__________________
I like to stay current!
  Reply With Quote
Old 28th January 2005, 12:39 AM   #7
anatech is offline anatech  Canada
diyAudio Moderator
 
anatech's Avatar
 
Join Date: Jun 2004
Location: Georgetown, On
Hi Anthony,
Those xformers should do fine. If you leave extra room on the chassis you can try the other ones later.

Are you going to use EL34's or 6CA7's ?
-Chris
  Reply With Quote
Old 28th January 2005, 02:12 AM   #8
Coulomb is offline Coulomb  England
diyAudio Member
 
Coulomb's Avatar
 
Join Date: Jul 2002
Location: Ancaster, Ontario
Quote:
Originally posted by anatech
Hi Anthony,
Those xformers should do fine. If you leave extra room on the chassis you can try the other ones later.

Are you going to use EL34's or 6CA7's ?
-Chris
Well I was thinking KT88's as suggested by SHIFTY,

Regards

Anthony
__________________
I like to stay current!
  Reply With Quote
Old 29th January 2005, 12:41 AM   #9
anatech is offline anatech  Canada
diyAudio Moderator
 
anatech's Avatar
 
Join Date: Jun 2004
Location: Georgetown, On
Hi Anthony,
I was just curious. The project power has gone up a fair bit with the KT-88's. I thought you were still down in EL-34 / 6L6 power ranges.
-Chris
  Reply With Quote
Old 29th January 2005, 03:22 AM   #10
Coulomb is offline Coulomb  England
diyAudio Member
 
Coulomb's Avatar
 
Join Date: Jul 2002
Location: Ancaster, Ontario
Hello Chris, I ended up getting the Eico boards instead of the ST35 boards. The Eico uses a 1650N output transformer which is rated at 60 Watts as opposed to the much smaller transformer of the ST35 which develops 17.5 Watts.

Am I on subject here? Is that what you were referring to Chris?

Regards

Anthony
__________________
I like to stay current!
  Reply With Quote

Reply


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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Diytube ST35 rev d whitelabrat Swap Meet 8 28th May 2010 08:36 PM
ss amp kits. tom10 Solid State 0 27th July 2008 03:33 PM
big doubt: dynakit st35 VS diytube st35clone leitmo Tubes / Valves 4 20th June 2008 02:54 AM
USB to XLR kits? tommas Digital Source 2 4th August 2007 01:45 AM
FS DIYtube ST-35 parts kit Jed Swap Meet 2 8th January 2007 03:28 PM


New To Site? Need Help?

All times are GMT. The time now is 12:21 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2