Please add to my confusion re stepup 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 12th December 2008, 11:24 PM   #1
diyAudio Member
 
Join Date: Mar 2004
Location: Albury NSW Australia
Default Please add to my confusion re stepup transformers

Hey Guys
I just bought an ortofon Rondo red.
Internal Impedance = 6 Ohms
recommended load impedance 10 - 200 Ohm.
Output Voltage 500 Micro Volts
I must admit to feeling a bit of a bonehead trying to wrap said head around which transformers to get (some say sowter 8055 then others say a different sowter 9750 low z etc)
Can anyone shed light on which sut they have used and also what else needs to be used... for instance a zobel network needs to be wired in on a sowter 8055.
I just have trouble understanding the ratios and which tranny i need etc etc
My phono stage is a c3g/6sl7 one with a 47k resistor across the input. I am willing to change that if needed (the resistor that is)
Thanks
Nick
__________________
"Better to say nothing and keep them guessing than to speak and remove all doubt."
  Reply With Quote
Old 13th December 2008, 12:32 AM   #2
diyAudio Member
 
dsavitsk's Avatar
 
Join Date: Jan 2005
Location: Hartford
http://www.intactaudio.com/forum/viewtopic.php?t=752
  Reply With Quote
Old 13th December 2008, 03:05 PM   #3
EC8010 is offline EC8010  United Kingdom
diyAudio Moderator Emeritus
 
EC8010's Avatar
 
Join Date: Jan 2003
Location: Near London. UK
The 8055 will work just fine with a 6R cartridge. Have a look at the Sowter site and it will tell you which Zobel network to use to optimise the transformer for that cartridge. The 1:10 step-up ratio will give you 5mV - a healthy signal. Almost all transformers need a Zobel network, it's just that they don't always know it. And yes, I use 8055.
__________________
The loudspeaker: The only commercial Hi-Fi item where a disproportionate part of the budget isn't spent on the box. And the one where it would make a difference...
  Reply With Quote
Old 14th December 2008, 10:28 AM   #4
diyAudio Member
 
Join Date: Mar 2004
Location: Albury NSW Australia
Default Thanks

Of what I read the Sowters are ok.. Although I wonder re the Lundahls.
Will let you know either way
Thanks again
Nick
__________________
"Better to say nothing and keep them guessing than to speak and remove all doubt."
  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
Transformer stepup question biovizier Solid State 1 30th December 2006 12:42 PM
stepup 12 to 15v perivision Car Audio 10 14th March 2006 10:10 PM
WTS: AMPLIMO TM3 (Used) 1:15 Stepup Transformer Richardgreat Swap Meet 0 12th April 2005 08:42 AM
Placement of MC stepup tranny. mattjk Analogue Source 2 17th March 2005 06:22 AM
ESL amp with 1:4 stepup transformer Bas Horneman Planars & Exotics 6 13th August 2003 05:32 AM


New To Site? Need Help?

All times are GMT. The time now is 04:10 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