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Old 16th June 2012, 05:11 AM   #31
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Originally Posted by Eli Duttman View Post
Repeat!! Is the power trafo intact?
Oh yeah works perfectly (tested)
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Old 16th June 2012, 10:29 PM   #32
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I have two of theses what value is the choke you speak of ?
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Old 17th June 2012, 04:40 PM   #33
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Here's another way to turning it into a pure amp with the least butchering, easily reversible. Just use the "Tape Out" jacks as inputs and add input resistors and, voila, you have a non-integrated amp..... or segregated amp?

Click the image to open in full size.
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Old 19th June 2012, 06:10 PM   #34
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Forgive me for saying this, but I think that you have unrealistic expectations. Almost everyone on this forum has a life somewhere else that takes most of their time. Many will only look into the forum once a day, and often rather less. Of those who had viewed your thread, I would think that most would not know what an Eico HF-81 amplifier is and so they would not reply (I certainly have never heard of that model). To express disappointment at a lack of response after only 5 hours from your original post seems completely unnecessary.
Oh come on... don't be like that I was just kidding ... accept of humble apology if my sense of humor annoyed you

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Attachment 287374

hope this helps
Oh thanks fella

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Originally Posted by directdriver View Post
Okay then, just build it like the circuit and use whatever existing parts you can salvage from the Eico. If you plan to use the Eico chassis then you can't use an octal tube like 5AR4 without drilling a bigger hole for its socket. I would just add a filament transformer so you can re-use the dual EZ81/6CA4 rectifier tubes.

Here's the schematic for the HF-81 and you will notice the Pilot amp section uses the same tube complement as the EICO so it's not that hard to implement the circuit. The Pilot is the best sounding 6BQ5 amp I have ever heard, period.
thanks for shcema ... I insist to use ez81 rectifiers

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Originally Posted by Triodethom View Post
I have two of theses what value is the choke you speak of ?
I don't know... google it and read the articles in sterophile

Quote:
Originally Posted by directdriver View Post
Here's another way to turning it into a pure amp with the least butchering, easily reversible. Just use the "Tape Out" jacks as inputs and add input resistors and, voila, you have a non-integrated amp..... or segregated amp?

Click the image to open in full size.
Oh it's a moot remedy... I should follow signal path in the way you said
thanks anyway
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Old 19th June 2012, 09:41 PM   #35
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Default There are no chokes in the hf-81 stock

There are NO choke in the stock hf-81 . Thanks for the pointless redirect to the stereophile article . You may find in this forum if you want some one to read an article the best thing to do is 1.provide a link and 2. have answer the question . How exactly did you determine the choke was ok and you are unable to determine the value of said choke. Regards
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Old 20th June 2012, 05:33 AM   #36
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Originally Posted by Triodethom View Post
There are NO choke in the stock hf-81 . Thanks for the pointless redirect to the stereophile article . You may find in this forum if you want some one to read an article the best thing to do is 1.provide a link and 2. have answer the question . How exactly did you determine the choke was ok and you are unable to determine the value of said choke. Regards
Oh I meant power transformer... tested O.K... this is the link in stereophile
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Old 25th June 2012, 08:40 PM   #37
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The Stereophile article has nothing to do with whether the amp has a choke or not.

The amp does NOT use a choke! So stop mentioning chokes!
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Old 25th June 2012, 09:04 PM   #38
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Quote:
Originally Posted by directdriver View Post
Here's another way to turning it into a pure amp with the least butchering, easily reversible. Just use the "Tape Out" jacks as inputs and add input resistors and, voila, you have a non-integrated amp..... or segregated amp?
I did just that a long long time ago, and it worked great. Actually, come to think of it, I did it on a Fisher. Maybe an HF-81 too... HF-86 can sound great too, but Eli Duttman is dead on with the 12BH7 idea.
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