Tapeheads Forums


Go Back   Tapeheads Forums > Service, Restorations, DIY Help, Manuals and Ads > Restorations by Tapeheads Members

Restorations by Tapeheads Members Did you do a great job on a vintage piece of gear? This is where you can show everyone your awesome work!

Universal Capstan Motor
Reply
 
Thread Tools Display Modes
  #1  
Old 01-16-2011, 08:26 AM
thefragger thefragger is offline
TapeHeads.Net Member
 
Join Date: Dec 2010
Location: Toronto, Ontario; Canada
Posts: 31
H.H. Scott 222C (LOTS of Pictures!)

Well, it's taken the better part of a year to get this little amp up and singing again. I bought 'er as a 'project amp' for my birthday last March and during the winter break from school I finally got 'er done!

Now I get to see what this whole tube rolling business is about.

Here's a restoration in images!




























































Reply With Quote
  #2  
Old 01-16-2011, 08:26 AM
thefragger thefragger is offline
TapeHeads.Net Member
 
Join Date: Dec 2010
Location: Toronto, Ontario; Canada
Posts: 31
Continued!





























































Reply With Quote
  #3  
Old 01-16-2011, 08:27 AM
thefragger thefragger is offline
TapeHeads.Net Member
 
Join Date: Dec 2010
Location: Toronto, Ontario; Canada
Posts: 31
Continued!























































Reply With Quote
  #4  
Old 01-16-2011, 08:28 AM
thefragger thefragger is offline
TapeHeads.Net Member
 
Join Date: Dec 2010
Location: Toronto, Ontario; Canada
Posts: 31
*reserved for future expansion*

Phew!
Reply With Quote
  #5  
Old 01-18-2011, 05:41 PM
Warped Bezel's Avatar
Warped Bezel Warped Bezel is offline
Learn about the B's and the C's
 
Join Date: Jan 2010
Location: Nowhere *everybody knows this is
Posts: 13,210
It's still Christmas with the old firebottles
Reply With Quote
  #6  
Old 01-18-2011, 06:00 PM
Elite-ist's Avatar
Elite-ist Elite-ist is offline
Serious Tapehead
 
Join Date: Feb 2009
Location: Squamish, B.C. Canada
Posts: 7,207
I haven't seen that much detail in a restoration procedure: I'm speaking of your picture-by-picture account. You don't even need words to explain what you had done. I love your attention to detail! How many other components have you restored, or restified? Thanks for the thread, fragger. I'm sure there will be questions regarding some of the steps you took. The ol' H.H. Scott 222C has never looked better. And are you happy with how it sounds?

Nando.
Reply With Quote
  #7  
Old 01-18-2011, 06:51 PM
thefragger thefragger is offline
TapeHeads.Net Member
 
Join Date: Dec 2010
Location: Toronto, Ontario; Canada
Posts: 31
Thank you--part of it was my fascination with my new DSLR and part of it was laziness about writing something up, but I do like the 'story through pictures' effect, I have to say ;)

This would be my first tube amp that I restored, before this one I was a solid-state guy through and through. The crown jewel in my collection is my Sony TA-F6B, which I bought as a parts unit and brought it back to life and into spec over roughly the same timeline (one year~ish) but with many, many more hours of troubleshooting and repair in that piece.

I am happy with how it sounds and the imaging gives me goosebumps every time I fire it up, but now with school picking up steam, the time I have to listen is shorter and the periods are fewer and far between.

Also the startup procedure involves me ramping up the voltage on my undersized VARIAC (can't handle the initial surge, but can sustain the amp) up to 117V since the wall puts out 125V--waiting on some filament transformers to build a voltage bucking box to live between the amp and the wall.
Reply With Quote
  #8  
Old 01-27-2011, 07:41 AM
Socal Sam's Avatar
Socal Sam Socal Sam is offline
Serious AudioHead
 
Join Date: Sep 2008
Posts: 3,693
Beautiful restore. Too bad you couldn't keep the original chassis finish. It must have been bad to do this extra work. So, what are you initial impressions?

I have a 399 Stereomaster receiver that sounds superb. Had two of them actually. Kept the one with the wood case.
Reply With Quote
  #9  
Old 01-27-2011, 10:00 AM
thefragger thefragger is offline
TapeHeads.Net Member
 
Join Date: Dec 2010
Location: Toronto, Ontario; Canada
Posts: 31
There was a lot of pitting--to do it right I should've popped out all the rivets and polished it up, then installed the new sockets that I have, but I just don't have that kinda time to trace the installed circuit (not always the same as the schematics!) and re-do everything!

Maybe the next one... ;)

The sound it excellent--there are a couple parts in the tone control section that I have to replace still, but this tube-rolling-thing is very very interesting! The different from Sovtek 12AX7 tubes to GE black-plate-triple-mica 5751, to Matsushita (Mullard) 12AX7 tubes was very noticeable with each roll.
Reply With Quote
  #10  
Old 02-04-2011, 08:33 PM
thefragger thefragger is offline
TapeHeads.Net Member
 
Join Date: Dec 2010
Location: Toronto, Ontario; Canada
Posts: 31
Added tip jacks tonight;





















Reply With Quote
  #11  
Old 02-05-2011, 06:47 PM
Warped Bezel's Avatar
Warped Bezel Warped Bezel is offline
Learn about the B's and the C's
 
Join Date: Jan 2010
Location: Nowhere *everybody knows this is
Posts: 13,210
Quote:
Originally Posted by thefragger View Post
Added tip jacks tonight;




You SURE you didn't vandalize an entire fleet of Go-kart motor spark plugs?
__________________
Music Matinee goes Deep Into The Groove...Rory Gallagher http://www.tapeheads.net/showthread....294#post445294 A Maxi-Mini Matinee!
Reply With Quote
  #12  
Old 02-05-2011, 08:28 PM
thefragger thefragger is offline
TapeHeads.Net Member
 
Join Date: Dec 2010
Location: Toronto, Ontario; Canada
Posts: 31
Quote:
Originally Posted by Warped Bezel View Post
You SURE you didn't vandalize an entire fleet of Go-kart motor spark plugs?
HA! That would make a more interesting story... ;)
Reply With Quote
  #13  
Old 06-16-2011, 10:52 PM
EM-X90 EM-X90 is offline
Banned
 
Join Date: Jan 2011
Posts: 165
Quote:
Originally Posted by thefragger View Post
Well, it's taken the better part of a year to get this little amp up and singing again. I bought 'er as a 'project amp' for my birthday last March and during the winter break from school I finally got 'er done!

Now I get to see what this whole tube rolling business is about.

Replacing stock Telefunken tubes would be like putting a Yugo engine in your Corvette.
Reply With Quote
  #14  
Old 06-17-2011, 06:44 AM
ke4mcl's Avatar
ke4mcl ke4mcl is offline
tapeheads.net supporter
 
Join Date: Apr 2011
Location: miami, fl
Posts: 8,001
HEY FRAGGER! awesome to see you here!

when i saw 1kv k40 caps the first thing i thought was "i wonder if he got those caps from fragger"? i scrolled up and there you were!

nice work bud! i admire your patience as i'd never go to that extreme on a restoration. i just dont have the attention span. that scott looks sweet!

i gotta ask...
did the AK police kick you out too? seems like a bunch of folks here (including myself) got kicked off the AK island.
__________________
certified hoarder of small plastic ribbon filled rectangles
Reply With Quote
  #15  
Old 06-17-2011, 09:21 AM
Nakdoc's Avatar
Nakdoc Nakdoc is offline
Highly Biased
 
Join Date: Nov 2008
Location: Nashville, TN
Posts: 4,780
I'm working on a 222C right now. Amazing sound in stock condition.
Reply With Quote
  #16  
Old 06-17-2011, 09:30 PM
southcoast68's Avatar
southcoast68 southcoast68 is offline
Serious Tapehead
 
Join Date: Sep 2010
Location: Florida USA
Posts: 490
Wow, you really went to town on this, and it turned out beautiful!! Congrats!! I don't know if this idea would be feasible or not, but with all the hard work you put into the interior details, it would be cool to have a plexiglas top cover made for it. Show off that restoration to the rest of the world! Again, great job, thanks for sharing it.

Cheers
Reply With Quote
  #17  
Old 07-12-2011, 07:35 PM
Rex Everything's Avatar
Rex Everything Rex Everything is offline
Shpongled!
 
Join Date: Aug 2008
Location: Mojave Desert!
Posts: 1,425
Looks good
__________________
"It's funny, some people are into threesomes and others are into war. It's a trippy time."
Reply With Quote
  #18  
Old 07-12-2011, 09:04 PM
Eminence1963's Avatar
Eminence1963 Eminence1963 is offline
DCC Lives On
 
Join Date: Oct 2010
Location: Washington
Posts: 1,661
Holy MOTHER OF GOD
Nice Job and PICs to boot
__________________
N K A W T G USAF Retired
Reply With Quote
  #19  
Old 07-12-2011, 09:07 PM
Eminence1963's Avatar
Eminence1963 Eminence1963 is offline
DCC Lives On
 
Join Date: Oct 2010
Location: Washington
Posts: 1,661
[QUOTE=thefragger;137581]Added tip jacks tonight;

Excuse my ignorance
What are tip jacks for?
__________________
N K A W T G USAF Retired
Reply With Quote
  #20  
Old 05-22-2012, 08:01 PM
thefragger thefragger is offline
TapeHeads.Net Member
 
Join Date: Dec 2010
Location: Toronto, Ontario; Canada
Posts: 31
Thank you for all the kind words! Completely forgot about this thread--my apologies!

Quote:
Originally Posted by EM-X90 View Post
Replacing stock Telefunken tubes would be like putting a Yugo engine in your Corvette.
The amp didn't come with tubes, so anything is better than what the amp came with

I've since managed to do some horse trading and now have some Telefunken ribbed and smooth plates in my possession. I was running it with Matsushita Mullard tubes in there before, switched over to a set of weak-testing smooth-plate Teles, and I've yet to try the ribbed Teles.


Quote:
Originally Posted by Eminence1963 View Post
Quote:
Originally Posted by thefragger View Post
Added tip jacks tonight;
Excuse my ignorance
What are tip jacks for?
So, this isn't a stock unit--I modded it (with the guidance of Craig at NOS Valves) to use the biasing scheme from the 299 amp, and what this lets me do is to use a 'close-enough' quad, then dial in each pair of tubes individually and get them all up to the correct bias point. The tip jacks connect over 10-ohm resistors and are where I plug in my multimeters so I can monitor the voltage over the resistors in order to calculate the current each plate is getting.
Reply With Quote
Reply

Thread Tools
Display Modes

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
Scott 121B(not 121A) pre amp schematic Audiomayvin Tube Gear - Preamps, Power and More! 0 04-18-2010 01:48 PM
HH Scott Speakers ALLAUDIO Speakers and Headphones 0 11-26-2009 11:57 AM



For more Tapeheads affiliates and links, see the Links and Resources page.
Would you like to see your company or site here?  CONTACT US


All times are GMT -7. The time now is 05:56 AM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright 2013, Tapeheads.Net. All rights reserved, no use of any element incorporated into this site without express written permission.