Go Back   Home > Forums > Commercial Sector > Vendor Forums > Tubelab

Tubelab Discussion and support of Tubelab products, prototypes and experiments

Reply
 
Thread Tools Search this Thread
Old 18th August 2013, 11:37 PM   #1
Einric is offline Einric  United States
diyAudio Member
 
Einric's Avatar
 
Join Date: Feb 2011
Location: Bozeman, MT
Default My Simple P-P Build

Hello All,

I have finally gotten around to building the SPP that I have been asking about for a while.
I will be building EL84 Style on this example.
So far I have the boards mostly stuffed.
I went with Dale RN & CFP Resistors, Sprague 716P's, Elna SILMIC II's for the LV electro's and Nippon & Panny's for my HV electro's.
I will be using the Triad C-14X choke instead of the 150Ω resistor.

I would like to go SS rectification on this one and I had a question, should I go with 300-0-300 or 275-0-275 since I won't have the tube rectifier drop?
Attached Images
File Type: jpg SPP Bottom.JPG (651.6 KB, 455 views)
File Type: jpg SPP Top.JPG (714.3 KB, 441 views)
  Reply With Quote
Old 29th August 2013, 09:58 PM   #2
Einric is offline Einric  United States
diyAudio Member
 
Einric's Avatar
 
Join Date: Feb 2011
Location: Bozeman, MT
Well.....My tubes have arrived.
I picked up a matched quad of EL84's and a matched pair of 12AT7's.
6L6 traded me some parts for a Hammond 272JX so I decided to stick with tube rectification.
My Triad C-14X 6H 200mA choke will show up tomorrow.
My next order from Mouser I will pick up a 60uF Motor Run cap and the last of misc. parts.
I am moving to a new house tomorrow and my progress on this project will be slow as a result, but since I have all the parts except for the output iron there will be progress finally.
Attached Images
File Type: jpg Matched Tubes.JPG (471.4 KB, 356 views)
  Reply With Quote
Old 9th September 2013, 12:26 AM   #3
Einric is offline Einric  United States
diyAudio Member
 
Einric's Avatar
 
Join Date: Feb 2011
Location: Bozeman, MT
Default tube socket trouble

Well fellas......my GORGEOUS tube sockets arrived.
Unfortunately they don't fit the pin spacing George provided.

What to do?
Order different ones or use leads and surface mount the sockets?
Attached Images
File Type: jpg IMG_20130908_182100.jpg (719.5 KB, 298 views)
  Reply With Quote
Old 9th September 2013, 01:01 AM   #4
diyAudio Member
 
vinylkid58's Avatar
 
Join Date: May 2005
Location: Victoria, B.C.
They do look like nice sockets. Any chance you can return them for a refund?

You really want the ones with the bent tabs for PCB mount, like these:

http://www.partsconnexion.com/CONNEX-73283.html

jeff
  Reply With Quote
Old 9th September 2013, 01:07 AM   #5
diyAudio Member
 
Join Date: Aug 2008
Location: Broomfield, CO
Email George & see if he'll sell you the sockets that are included in the parts kit. They're good quality & allow all the sockets to be mounted at the same elevation off the board without doing anything weird.

Ron
  Reply With Quote
Old 9th September 2013, 01:07 AM   #6
Einric is offline Einric  United States
diyAudio Member
 
Einric's Avatar
 
Join Date: Feb 2011
Location: Bozeman, MT
I absolutely can return them and I already have sockets like the ones you showed in my shopping cart.
The ones I'm looking at have more of an open hole at the pin entry though.
They are from AES and the ones that George specs in the parts list.

Last edited by Einric; 9th September 2013 at 01:11 AM.
  Reply With Quote
Old 9th September 2013, 02:45 AM   #7
diyAudio Member
 
tubelab.com's Avatar
 
Join Date: Jul 2005
Location: South Florida
Quote:
They are from AES and the ones that George specs in the parts list.
I usually get my sockets in 100 piece bags from CE Distribution. They are the wholesale division of AES. I have obtained the same sockets from Stan at ESRC.
__________________
Too much power is almost enough! Turn it up till it explodes - then back up just a little.
  Reply With Quote
Old 26th September 2013, 01:02 AM   #8
Einric is offline Einric  United States
diyAudio Member
 
Einric's Avatar
 
Join Date: Feb 2011
Location: Bozeman, MT
Boards are complete and I will be going with a 6H 150Ω 200mA choke.
I'm still debating on a Motor Run Cap or not, Would THIS one be suitable?
Would there be any benefit to paralleling 3 of these to get 135uF and just leave out the stock 150uF, or would it be better to parallel one of the MR Caps with a 100uF Electrolytic?
The 272JX will be wonderful, IT IS HUGE & I won't even really push it that hard with this amp.
My Edcor CXPP25-MS-8K OPT's have been on order for about 3 weeks now so there is not much longer to wait on them.
I will probably be doing a Hickory or a Mahogany chassis with .100" Aircraft Aluminum top, I have plenty of wood in my pile and I have found a good supplier for aluminum sheet stock.
Attached Images
File Type: jpg SPP Top.JPG (933.6 KB, 221 views)
File Type: jpg SPP Bottom.JPG (907.8 KB, 68 views)
File Type: jpg PT & Choke.JPG (865.4 KB, 75 views)
  Reply With Quote
Old 26th September 2013, 02:25 PM   #9
rknize is offline rknize  United States
diyAudio Member
 
rknize's Avatar
 
Join Date: Feb 2009
Location: Chicagoland
Send a message via AIM to rknize Send a message via Yahoo to rknize
If you search the forum, you should find a builder who made an SSE using all motor run caps. So yes, it can be done. These caps are quite large, though, and the law of diminishing returns quickly apply.

I don't have a motor run cap on my SPP, but I will probably stick one in there at some point. It looks like you have a Nichicon capacitor in that position, which is a decent part to begin with. The one you have chosen will work fine. Keep in mind that you can use a 370VAC capacitor as well. They can handle upwards of 500VDC. Here is one that is only slightly larger but gives you more capacitance:

Surplus Center - 60 MFD 370 VAC MOTOR RUN CAPACITOR
  Reply With Quote
Old 26th September 2013, 09:56 PM   #10
Einric is offline Einric  United States
diyAudio Member
 
Einric's Avatar
 
Join Date: Feb 2011
Location: Bozeman, MT
WOOOT! My OPT's from Edcor shipped today.
19 day turn around!

Temco has a 100uF 440V for $15.50 w/ free shipping on Ebay, I have some 47uF 450V snap ins in my parts bin.
The cap I have there is a Nippon Chemi-Con in that position, all parts have come from Mouser and other reputable sources.

Last edited by Einric; 26th September 2013 at 10:01 PM.
  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
Simple P P build cost millerlitescott Tubelab 17 23rd December 2011 12:19 AM
simple se build skipper Tubelab 151 2nd October 2009 12:47 PM
looking for simple speker build help colin.hepburn2 Full Range 19 20th September 2008 12:55 PM
a simple amplifier to build? testarossa2k Solid State 9 13th December 2006 08:30 PM


New To Site? Need Help?

All times are GMT. The time now is 05:31 PM.


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