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 27th December 2004, 07:03 PM   #1
diyAudio Member
 
Join Date: Dec 2003
Location: Montreal
Default Tube multiplex adapter parts replacement

I've just got an old EICO HFT90 mono FM tuner, so I want to build the EICO MX99 multiplex adapter since I've been able to find the building instruction manual on the internet that shows you how to build it. The problem is that since I don't have the kit with all the parts, but only a free PDF, there are some parts that turned obsolete with time(Or I don't know what they are).

Here they are: (From the manual)
Coil, filter, 19kc
Coil, doubler, 19kc
Coil, oscillator, 38kc
Coil, trap, 67kc
__________________
Antoine
http://dmsaudio.ca/
  Reply With Quote
Old 28th December 2004, 10:16 AM   #2
moamps is offline moamps  Croatia
diyAudio Member
 
Join Date: Oct 2002
Location: Croatia
Default Re: Tube multiplex adapter parts replacement

Quote:
Here they are: (From the manual)
Coil, filter, 19kc
Coil, doubler, 19kc
Coil, oscillator, 38kc
Coil, trap, 67kc [/B]
They are coils (L= 30 to 100mH) in tuned LC filters on 19, 38 and 67kHz. You can find more info here: http://www.turneraudio.com.au/htmlwe...mpxdecoder.htm

Regards,
Milan
  Reply With Quote
Old 28th December 2004, 02:56 PM   #3
diyAudio Member
 
Join Date: Dec 2003
Location: Montreal
And in the manual ( http://www.mcmlv.org/Archive/HiFi/EicoMX99.pdf ) it tels it's adjustable.

How do I build these?
In the Eico one, I see two coils in parallel with an arrow in the middle, with (sometimes) caps and a fixed point on one of the coils.

Sorry, I might not understand until I see pics of a DIY one(because I think a real one is a big metal box) and exact instructions/values.


BTW, someone know where I can get a 33mm / 1.5" shaft pot?
__________________
Antoine
http://dmsaudio.ca/
  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
Magnavox Multiplex Adapter (for FM stereo) GordonW Swap Meet 0 4th August 2007 06:12 PM
replacement parts robbie b Parts 1 7th February 2005 03:15 AM
Looking for replacement parts jschen Parts 2 1st June 2004 02:59 PM
replacement parts nak Parts 1 2nd December 2002 03:49 PM


New To Site? Need Help?

All times are GMT. The time now is 07:55 AM.


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