Nakamichi PA-7II: Thermofuse in the potted transformer - Page 3 - diyAudio
Go Back   Home > Forums > Amplifiers > Pass Labs

Pass Labs This forum is dedicated to Pass Labs discussion.

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 19th December 2010, 03:01 AM   #21
6L6 is offline 6L6  United States
diyAudio Member
 
6L6's Avatar
 
Join Date: Oct 2010
Location: Denver, Colorado
I have a CA-7. I would love to have a complete set like yours...
  Reply With Quote
Old 19th December 2010, 03:08 AM   #22
diyAudio Member
 
Join Date: Aug 2007
Quote:
Originally Posted by 6L6 View Post
I have a CA-7. I would love to have a complete set like yours...
Thanks. There's a certain look to the PA-7 that has always made me want one. I actually bought a really mint (and problem free) PA-5 a few weeks ago, but it just doesn't look as cool without the manly handles. I'm tempted to buy Nak tape deck just to complete the rack look, but I donated almost all of my cassette collection to the goodwill a few years ago.

On the Nak topic, check out this Dragon Turntable for sale (no affilication):

Nakamichi DRAGON-CT turntable Very RARE Orignal BOX on eBay.ca (item 300504326748 end time 19-Dec-10 21:27:10 EST)
  Reply With Quote
Old 19th December 2010, 04:09 AM   #23
6L6 is offline 6L6  United States
diyAudio Member
 
6L6's Avatar
 
Join Date: Oct 2010
Location: Denver, Colorado
Neat! I had no idea that Nak made a turntable.

As for a cassette deck? It's just not a hi-fi source. Even if the RX-505 is a cool deck...
  Reply With Quote
Old 20th December 2010, 08:45 PM   #24
diyAudio Member
 
Join Date: Jan 2008
Location: Bountiful, You-Taw
I've actually had great sucess accessing locations on a variety of potted items using a dremel tool with small pointed metalic die grinding wheel. First you will want to get the transformer x-rayed so you can pinpoint exactly where the thermal fuse is at. Then if it is actually easily accessable go to work at that exact location with the dremel. Be sure to have someone run a vaccum cleaner to gather up the dust... the dremel will go through the potting coumpound quickly and generate gobs of dust. The last thing I repaired was a potted AC line filter that was long ago obsolete. It had burn't off it's connection from the protruding lead inside under the potting material. I ground it away and repaired it in 30 min. time and put the NTSC genny back in service within an hour. I hope this might be of help to you on this. That is an amp that is worth saving even if you have to get a tranny wound for it...

Mark
  Reply With Quote
Old 21st December 2010, 04:22 AM   #25
diyAudio Member
 
Join Date: Aug 2007
Quote:
Originally Posted by p. jordan View Post
That's great! I have a Nakamichi PA-7, and a Bose 1801.
Both of these units get warm, and would like to know what
you use to measure the fin temperature.

Thanks,
Phil
Hi Phil, so for taking so long to answer your question:

I have Infrared Thermometer Gun that I just point and shoot to get an accurate temperature reading on any surface or component. It's laser sight and everything
  Reply With Quote
Old 21st December 2010, 04:26 AM   #26
diyAudio Member
 
Join Date: Aug 2007
Quote:
Originally Posted by Mark Allen View Post
I've actually had great sucess accessing locations on a variety of potted items using a dremel tool with small pointed metalic die grinding wheel. First you will want to get the transformer x-rayed so you can pinpoint exactly where the thermal fuse is at. Then if it is actually easily accessable go to work at that exact location with the dremel. Be sure to have someone run a vaccum cleaner to gather up the dust... the dremel will go through the potting coumpound quickly and generate gobs of dust. The last thing I repaired was a potted AC line filter that was long ago obsolete. It had burn't off it's connection from the protruding lead inside under the potting material. I ground it away and repaired it in 30 min. time and put the NTSC genny back in service within an hour. I hope this might be of help to you on this. That is an amp that is worth saving even if you have to get a tranny wound for it...

Mark
Thanks for the post Mark, your method sounds like the best way to approach this type of problem. I was fully prepared to get a custom transformer made if necessary, so I'm extra happy to get it running at no cost beyond a few hours of chiseling.
  Reply With Quote
Old 22nd December 2010, 09:56 AM   #27
diyAudio Member
 
Join Date: Nov 2009
Quote:
Originally Posted by electrafixion71 View Post
Hi Phil, so for taking so long to answer your question:

I have Infrared Thermometer Gun that I just point and shoot to get an accurate temperature reading on any surface or component. It's laser sight and everything
Thanks for the tip. Will get one soon!!
  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
Nakamichi PA-7 & PA-5 Bias Setting? sourceoneaudio Solid State 6 8th March 2012 12:37 PM
Calculating VA for replacement transformer in a OMS-7II CD-Player Salar Digital Source 1 29th June 2010 06:02 PM
Nakamichi PA-7II manuals - HELP Peteb Pass Labs 4 4th October 2007 07:09 PM
Nakamichi OMS-7II help proteo01 Digital Source 0 17th September 2007 03:12 AM
Nakamichi PA-7 Power Transformer sourceoneaudio Solid State 0 22nd December 2006 03:53 PM


New To Site? Need Help?

All times are GMT. The time now is 02:51 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