hammond transformers? - diyAudio
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 31st July 2008, 03:16 PM   #1
ipop07 is offline ipop07  Canada
diyAudio Member
 
Join Date: Jul 2008
Default hammond transformers?

I posted this on another forum as well hoping to get some information in time for my project due date. I am not sure if this is the right place to ask this but I am hoping that if its not you guys can lead me in the right direction at least. I am working on a project and i was wondering what are the amps that hammond transformers work in as drop in replacements or upgrades with little or no mods...Thank you very much anticipated.


peace&love
  Reply With Quote
Old 31st July 2008, 04:03 PM   #2
Gluca is offline Gluca  Italy
diyAudio Member
 
Gluca's Avatar
 
Join Date: Nov 2004
Location: Back to Italy
Many amps. I belive that more info on that amp would allow someone to direct you to the right choice.

Ciao
Gianluca
  Reply With Quote
Old 18th August 2008, 07:14 PM   #3
ipop07 is offline ipop07  Canada
diyAudio Member
 
Join Date: Jul 2008
there is no specific amp, but i was asking what do people buy from hammond and put it in an amp and it works fine....what tranny in what amp
  Reply With Quote
Old 18th August 2008, 07:30 PM   #4
diyAudio Member
 
Join Date: Apr 2003
Location: Portland,Oregon
Blog Entries: 4
Send a message via AIM to DigitalJunkie
It depends on the output tubes used (primary impedance) and power level. Ohh,and topology-You can't use a SE transformer in a PP amp,and vice-versa.
  Reply With Quote
Old 18th August 2008, 07:41 PM   #5
AuroraB is offline AuroraB  Norway
diyAudio Member
 
AuroraB's Avatar
 
Join Date: May 2001
Location: Norway, -north of the moral circle..
I'm no tube expert at design level, but as Junkie says, the design of the amp dictates what kind of transformer to use. Hammond makes transformers to suit most of the common classic combinations of PP output tubes, like EL34s, KT66s, 77s and 88s, 6550s, EL84s etc. etc. Pinpointing specific amps is a major task and will make a very long list! Forget about McIntosh, though, - most of them use special transformers.
__________________
While the Lie leapt from Bagdad to Constantinopel, the Truth was still looking for it's sandals!
  Reply With Quote
Old 18th August 2008, 07:59 PM   #6
diyAudio Member
 
kstagger's Avatar
 
Join Date: Dec 2003
Location: Grand Rapids
I buy Hammond PTs and Chokes almost exclusively for my amplifiers. Are the best? Maybe not, but if one of them ever goes south, a replacement is just a click away.

I've used various output iron (Audio Note, One Electron, Electraprint) and haven't used any of Hammond's iron until now. I'm using the 1627SEA in my latest amplifier project - so far I've been very pleased for the money.
  Reply With Quote
Old 18th August 2008, 08:51 PM   #7
diyAudio Member
 
Miles Prower's Avatar
 
Join Date: May 2005
Location: USA
Blog Entries: 6
Quote:
Originally posted by ipop07
there is no specific amp, but i was asking what do people buy from hammond and put it in an amp and it works fine....what tranny in what amp
I designed a project based on PP 807s, and used a Hammond 1650H. This is rated at 30W, 6K6ct (PRI), 4-8-16 (SEC). It promised f(l)= 20Hz and f(h)= 30KHz, and that's what I measured open loop. Sure, may not the the "best", but then, again, Hammonds don't cost what Lundahl, Magnequest, &c cost. I got somewhat better performance from a NOS Stancore OPT, but that one was a 4K4ct primary, so not really a fair comparison.

The straight PP OPTs (no ultralinear taps) work just great. Can't vouch for other Hammond xfmrs, and I have heard that they have been having difficulties with their SE OPTs (wonkey frequency behaviours) and UL OPTs (miswired primaries).

Take your pick: YMMV.
__________________
There are no foxes in atheistholes
www.dolphin-hsl.com
  Reply With Quote
Old 19th August 2008, 12:48 AM   #8
diyAudio Member
 
Ty_Bower's Avatar
 
Join Date: Mar 2007
Location: Newark, DE
Default Re: hammond transformers?

Quote:
Originally posted by ipop07
I am working on a project and i was wondering what are the amps that hammond transformers work in as drop in replacements or upgrades with little or no mods...
Tell us more about your project, and maybe we can better answer your question. You ask which amps will accept a Hammond transformer, but you have no specific amp or Hammond transformer in mind. This is a diy forum - I'd expect that there are lots of "Hammond compatible" amplifiers built by the forum members. I've got a 6L6/EL34/KT88 single ended amp with a Hammond power transformer, and I've also built a push-pull EL84 amp with Hammond outputs. Would they count? The Hammonds weren't really "drop in replacements" - the Hammonds were the original transformers the amps had from the day they were built.
  Reply With Quote
Old 19th August 2008, 10:22 PM   #9
diyAudio Member
 
Join Date: Jul 2003
Location: Ann Arbor, MI
hey-Hey!!!,
I've found the 1650R 5k/100W to be an exceptional model. It works for a lot of the usual audio valves, with a little attention to B+ to fit the load line properly.
cheers,
Douglas
__________________
the Tnuctipun will return
  Reply With Quote
Old 19th August 2008, 10:54 PM   #10
wg_ski is offline wg_ski  United States
diyAudio Member
 
Join Date: Oct 2007
So what B+ would you recommend, with the 1650R's and KT88's? I have a pair of the trannies and some KT88's gathering dust that could be resurrected this winter.
  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
For sale: Hammond transformers eitanwaks Swap Meet 4 6th September 2007 08:33 AM
Hammond Driver transformers poynton Tubes / Valves 6 27th August 2007 04:01 PM
hammond transformers eitanwaks Swap Meet 0 13th May 2007 09:20 AM
Hammond Transformers Ham Swap Meet 2 16th March 2007 10:45 PM
Hammond Transformers Gabevee Tubes / Valves 0 5th April 2004 02:47 PM


New To Site? Need Help?

All times are GMT. The time now is 07:28 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