World-Designs-Forum  

Go Back   World-Designs-Forum > WAD > WAD General
Register FAQ Members List Calendar Gallery Today's Posts Search Today's Posts Mark Forums Read

WAD General For discussions re World Audio Design

Reply
 
Thread Tools Display Modes
  #11  
Old 6th June 2018, 02:49 PM
goonybird goonybird is offline
Junior Member
 
Join Date: May 2018
Location: Northampton UK
Posts: 10
Default Re: KEL34 just acquired

Thanks again, The mismatched EL34 were just for testing and getting it up and running. I think 2x are JJ 1x Electroharmonix and 1x I forget but only cost about £30 the lot (all new unboxed)
Reply With Quote
  #12  
Old 7th June 2018, 09:57 AM
Richard Richard is offline
Super Moderator
 
Join Date: Dec 2005
Location: Notts
Posts: 4,633
Default Re: KEL34 just acquired

Hi yes I'd build it all as standard first to check all is well. It looks like it's wired as single input with vol control so a CDp/tuner will be ideal for a listen. Keep an eye on the EL34s for any overheating or humming (signs of imbalance) and use old speakers or a couple of 8 ohm resistors as loads for testing and voltage checks. You can always mod it later if you feel the need. I thought mine was a great amp with lots of bounce and drive more akin to an ST20 than a Radford I think, be good to hear how it goes
Reply With Quote
  #13  
Old 23rd January 2019, 02:35 PM
goonybird goonybird is offline
Junior Member
 
Join Date: May 2018
Location: Northampton UK
Posts: 10
Default Re: KEL34 just acquired

Grief over 6 months without progress.
So found a Toroid Tranformer Metal cover on ebay from China for under a tenner.

https://www.ebay.co.uk/itm/120-66mm-...53.m2749.l2649

Fits perfect so will mount mains tx on top for cosmetics. good finish and match for black on main chassis. 3 holes drilled with grommets for wires. Going to try a M6 Nylon fixing bolt through for safety.

Other job is polishing OP Tx tops, wanted chrome but quoted £60!, then will get on with selective components replaced upgraded.

BTW some lettering is a bit patchy, any suggestions to re-letter controls etc
Reply With Quote
  #14  
Old 23rd January 2019, 09:41 PM
Greg.'s Avatar
Greg. Greg. is offline
Senior Member
 
Join Date: Dec 2005
Location: Bristol, UK
Posts: 3,160
Default Re: KEL34 just acquired

I wouldn’t use a nylon bolt to mount the Tx. You want to torque this fixing up tight. Nylon won’t do it.

Your old O/P Tx covers are probably cadmium plated. You’ll never get them to buff up well and in any case they’ll go dull quickly. Lacquer just makes it go milky. Contact WD owner, Matthew and see if he’ll sell you a pair of chrome covers. If not, do an internet search. You may well find covers nicely finished that fit. £60 for chromeing is the going rate generally.

Regarding your lettering problem, I’d be inclined to fit an engraved or silk screen printed face plate. If your chassis size is the same as the current WD one, you could buy one from Matthew, WD. You would need to move some stuff around such as putting the mains input switch to the chassis rear, making volume pot and selector switch simetrically located. These days, do you still require the tape out switch?

Failing that, design your own faceplate. Go to:

https://www.frontpanelexpress.com

Or

https://www.schaeffer-ag.de/en/downl...yAAEgJeu_D_BwE

You need to learn their software but both of them produce a cracking product. My observation is most DIYers doing this at the moment use Front Panel.

I hope that helps.
Reply With Quote
  #15  
Old 24th January 2019, 06:55 PM
goonybird goonybird is offline
Junior Member
 
Join Date: May 2018
Location: Northampton UK
Posts: 10
Default Re: KEL34 just acquired

Hi thanks again.
Just put Mains TX on today and M6 Nylon bolt and nut surprisingly torques up nice and solid.
Other job was cutting out a hole for an IEC socket.
Have been polishing the O/P TX caps and they have come up lovely. They originally appeared more like untreated mild steel dull and spots of rust. Will try spraying with lacquer. If it doesn't work can always strip them.
Reply With Quote
  #16  
Old 25th January 2019, 08:39 AM
bob orbell bob orbell is offline
Senior Member
 
Join Date: Nov 2009
Location: kettering northants.
Posts: 1,667
Default Re: KEL34 just acquired

We your advice fell on deaf ears Greg, .I suppose we all thought we knew everything once. Bob
Reply With Quote
  #17  
Old 25th January 2019, 11:49 AM
Phil Y's Avatar
Phil Y Phil Y is offline
Senior Member
 
Join Date: Jul 2006
Location: Bristol, UK
Posts: 692
Default Re: KEL34 just acquired

Greg,

Thanks for those links.
Do you know (very roughly) how much they charge for a panel?
Lets say for arguments sake, a simple design, similar to a WAD amp, a couple of holes and a bit of lettering, e.g." Volume" and "Selector".

Phil.
__________________
Commission for Dark Skies (CfDS)
Reply With Quote
  #18  
Old 25th January 2019, 04:14 PM
Greg.'s Avatar
Greg. Greg. is offline
Senior Member
 
Join Date: Dec 2005
Location: Bristol, UK
Posts: 3,160
Default Re: KEL34 just acquired

Sorry Phil, I haven’t a clue, but go onto AT and PM Ray P or Thermionic Idler as they’ve both used Front Panel recently. Ray would be your best bet as he has done the sort of thing you are talking about.
Reply With Quote
  #19  
Old 25th January 2019, 06:16 PM
goonybird goonybird is offline
Junior Member
 
Join Date: May 2018
Location: Northampton UK
Posts: 10
Default Re: KEL34 just acquired

Quote:
Originally Posted by bob orbell View Post
We your advice fell on deaf ears Greg, .I suppose we all thought we knew everything once. Bob
Not sure if thats aimed at me?

otherwise people been helpful on here.
Reply With Quote
  #20  
Old 26th January 2019, 08:36 AM
bob orbell bob orbell is offline
Senior Member
 
Join Date: Nov 2009
Location: kettering northants.
Posts: 1,667
Default Re: KEL34 just acquired

Greg myself and many others have a wealth of knowledge on here, Greg advised against using a nylon fixing, I agree, Greg advises don't lacquer the OP transformer caps and your next post say's you have used nylon and lacquered the caps, as I said. Bob
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


All times are GMT +1. The time now is 01:34 PM.


Powered by vBulletin® Version 3.7.3
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Copyright World Designs