Found an Eico HF-86 for sale, is it worth it? - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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
Thread Tools Search this Thread
Old 6th August 2011, 10:04 PM   #1
diyAudio Member
Join Date: Jan 2007
Location: Central Iowa
Default Found an Eico HF-86 for sale, is it worth it?

I was trolling the local classified posts and I found someone selling an Eico HF-86 for $250 in "very good condition". I haven't requested pictures yet, if it is fully functional, or if it has tubes or not. I am wondering if this is a reasonable price for this amplifier? I'm not real up on vintage gear and what they are bringing these days. Thanks!

  Reply With Quote
Old 6th August 2011, 10:34 PM   #2
diyAudio Member
Join Date: Apr 2004
Location: Monroe Township, NJ
Check the schematic out. The "iron" should be decent, which gives you all sorts of options. The 'U7 section of the 12DW7 definitely makes a better "concertina" phase splitter than a 'X7 section does.

If the seller will come down a bit, buy.
Eli D.
  Reply With Quote
Old 6th August 2011, 10:45 PM   #3
kevinkr is offline kevinkr  United States
diyAudio Moderator
kevinkr's Avatar
Join Date: Sep 2004
Location: Boston, Massachusetts
Blog Entries: 6
Is that price quoted for a pair or for a single amplifier? This design IMHO is probably sonically inferior to the Dyna ST-35 which is stereo and is currently available as a kit new - might be a better choice unless that price is for a pair.

"To argue with a person who has renounced the use of reason is like administering medicine to the dead." - Thomas Paine
  Reply With Quote
Old 7th August 2011, 01:12 AM   #4
diyAudio Member
Join Date: May 2010
Location: Ball Ground, GA
The HF-86 is stereo, and is basically the same power amplifier section as that of the HF-81, so it certainly has its following (they use the same transformer set).

While the Eico transformers are decent enough, in my experience they are no match for the ST-35's transformers. The Eico transformers typically have a power bandwidth of 10 watts RMS from 30 Hz to 15 kHz, where distortion can be typically held to typically no more than 1% THD in the usual designs.

On the other hand, the ST35's transformers can handle more power, at less distortion, and across the full 20 - 20 kHz bandwidth.

With some haggling, the Eico isn't bad, but the Dyna would be the better performer.

  Reply With Quote
Old 7th August 2011, 04:42 AM   #5
diyAudio Member
Join Date: Jan 2007
Location: Central Iowa
Thanks a lot guys!

I'll be calling the seller tomorrow, getting some details on this amplifier, and I'll see if I can bring him down in price. It might be a big week, my girlfriend found me a lead on some Western Electric gear. We'll see how that goes. Thanks again, I'll be posting back with pictures if I end up with the Eico!

  Reply With Quote


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
Eico HF-86 service_guy Tubes / Valves 1 21st February 2010 10:11 PM
help w/ Eico hf-81 paulnparis Tubes / Valves 3 29th August 2009 12:57 PM
Eico HF-32 crick Parts 3 25th June 2007 01:18 AM
Any comments on Eico HF-14 and HF-85 percy Tubes / Valves 5 13th January 2005 12:11 AM

New To Site? Need Help?

All times are GMT. The time now is 09:33 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2