How good are cheap tranny-interstages

zobsky · 12th March 2004, 12:23 AM

Still researching on phase splitting options for my PP 6bg6 amp. I've read a few good cases for input phase splitter trannys and/or interstages.

the only thing that prevents me from using such things is .... COST

, ... welll not cost in the pure sense, .. but the idea of using a $70- 100 phase splitter with a pair of $6 tubes and a $30 OPT. i may still go that way, .. but I'd like to investigate some more about alternative phase splitters which don't cost a lot of $$$ , ... just for the coolness factor

I've also been hearing some good things about the applicability of cheap (less than $10 ) edcor trannies run in parafeed as in the thread
http://www.audioasylum.com/scripts/t...ubediy&m=45954
I'm considering an edcor interstage in a parafeed arrangement to do double duty as a balanced pre-out and phase splitter. this arrangement is intended to power 6bg6 tubes in push pull. I was thinking of using a 5687 as the driver tube for each channel. basically a 2 stage parafeed coupled PP amp. No one's biting over there, so I'm asking for opinions here.

any opnions on how good this idea could potentially sound vs. more conventional tube based cathodyne /or long tailed phase splitters?

also, I notice a slight dip in the bass response of the interstage? could this be remedied by parafeed cap substitutions?

Any opinions on parafeed (DC blocking) IT vs. regular IT. I see a strong case made for parafeed here http://www.raleighaudio.com/chapter_2.htm .

thanks

SemperFi · 7th March 2012, 06:35 PM

I'm really pleased with the Edcors in guitar amps. Havent listened to them in a HiFi amp tho, so cant say anything about their broadband fidelity. I've been meaning to try them in a HiFi amp, but havent had the time. They measure reasonably flat 20-20k.

Globulator · 7th March 2012, 07:36 PM

Holy thread resurrection Batman!

Is there any details online about Edcor interstage transformers?
Like ratios, impedances, prices etc?

12th March 2004, 12:23 AM	#1
zobsky diyAudio Member Join Date: Mar 2002 Location: Dallas, Tx, USA	How good are cheap tranny-interstages Still researching on phase splitting options for my PP 6bg6 amp. I've read a few good cases for input phase splitter trannys and/or interstages. the only thing that prevents me from using such things is .... COST , ... welll not cost in the pure sense, .. but the idea of using a $70- 100 phase splitter with a pair of $6 tubes and a $30 OPT. i may still go that way, .. but I'd like to investigate some more about alternative phase splitters which don't cost a lot of $$$ , ... just for the coolness factor I've also been hearing some good things about the applicability of cheap (less than $10 ) edcor trannies run in parafeed as in the thread http://www.audioasylum.com/scripts/t...ubediy&m=45954 I'm considering an edcor interstage in a parafeed arrangement to do double duty as a balanced pre-out and phase splitter. this arrangement is intended to power 6bg6 tubes in push pull. I was thinking of using a 5687 as the driver tube for each channel. basically a 2 stage parafeed coupled PP amp. No one's biting over there, so I'm asking for opinions here. any opnions on how good this idea could potentially sound vs. more conventional tube based cathodyne /or long tailed phase splitters? also, I notice a slight dip in the bass response of the interstage? could this be remedied by parafeed cap substitutions? Any opinions on parafeed (DC blocking) IT vs. regular IT. I see a strong case made for parafeed here http://www.raleighaudio.com/chapter_2.htm . thanks __________________ "Any fool can know. The point is to understand" - Albert Einstein

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7th March 2012, 06:35 PM	#2
SemperFi diyAudio Member Join Date: Jan 2002 Location: nowhere	I'm really pleased with the Edcors in guitar amps. Havent listened to them in a HiFi amp tho, so cant say anything about their broadband fidelity. I've been meaning to try them in a HiFi amp, but havent had the time. They measure reasonably flat 20-20k.

7th March 2012, 07:36 PM	#3
Globulator diyAudio Member Join Date: Aug 2004 Location: Cambridge, England.	Holy thread resurrection Batman! Is there any details online about Edcor interstage transformers? Like ratios, impedances, prices etc?