Audiokarma.org
Audiokarma Featured Sponsor

Go Back   AudioKarma.org Home Audio Stereo Discussion Forums > Solid State


We appreciate your help

in keeping this site going.
Reply
 
Thread Tools Display Modes
  #1  
Old 04-23-2005, 07:00 PM
MCS Guy's Avatar
MCS Guy MCS Guy is offline
The MCS extraordinaire
 
Join Date: Mar 2004
Location: Mims, FL
Posts: 467
PROJECT/one Mark IV A Receiver

I got this one off ebay for a price of 7.99. It would power on, but no sound from both channels. Ended up that the right channel outputs were shorted.

With help from an AK member, I was able to get some ON semi MJ21193/MJ21194 output transistors and put them in Yesterday. The outputs, heat sinks, and driver boards are easily removed by 2 screws. The Driver boards are socketed to the Protection/PS board below it. Changing outputs on this receiver is a walk in the park. She came alive and sounding pretty sweet. Spent today cleaning the controls and faceplate. Blew out the dust and waxed the transformer.

The receiver seems to be about 40-50 watts RMS (45 volt Rails) with 2-10,000mfd Caps in the power supply. The tuner is a 4 gang/3 gang setup and pulls in stations with ease. The receiver has 3 sets of speaker terminals and Pre and Main jumpers.

Very nice looking receiver. The signal meters remind me of marantz for some reason

Last edited by MCS Guy; 04-23-2005 at 07:11 PM.
Reply With Quote
  #2  
Old 04-23-2005, 07:03 PM
MCS Guy's Avatar
MCS Guy MCS Guy is offline
The MCS extraordinaire
 
Join Date: Mar 2004
Location: Mims, FL
Posts: 467
3 more pics
Reply With Quote
  #3  
Old 04-23-2005, 11:56 PM
yrly's Avatar
yrly yrly is offline
Breaking records is good?
 
Join Date: Sep 2003
Location: Buffalo NY
Posts: 2,537
Same white painted traces as the Mark 1500... Wonder who did these for them? Any identifiers in there anywhere? The Mark 1500s are completely void of anything to positively identify it. Looks to me they are either Pioneer or Hitachi made. Designs share some similarities with each (perhaps on purpose?).
__________________
-Give me Fisher or give me Death- yrly
-If it's free, it's for me! - yrly
-when you lose track of the receiver count you know you've got too many
Reply With Quote
  #4  
Old 04-24-2005, 04:39 AM
bolly's Avatar
bolly bolly is offline
Banned
 
Join Date: Sep 2003
Location: CFB Borden
Posts: 17,062
Yep, she's a looker!
Reply With Quote
Reply


Thread Tools
Display Modes

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

Forum Jump


All times are GMT -5. The time now is 01:20 PM.



Friends of Audiokarma
We appreciate your help in keeping this site going.
Wargos Electronics
Amps and Sound
Sonneteer
Organ Donor Parts
Sound Stage Direct
Parts Connexion
AudioClassics
Atlantic Systems
AV Solutions
Take Five Audio
Tone Arm Audio
Audio Salon
Musical Paradise
Audience AV
Classic Sound Repair
Simply Speakers
McIntosh Cabinets
BD Enterprise
Cabledyne
Howard Products
BOI Audio Works
FM DX Antenna
Amplifiedparts
Siliconray
RSL Speakers
Vinyl Magic Record Cleaner
Urban Antigue Radio
Grant Fidelity
Many Moons Audio
Yesterday's Audio
The Tube Store
DeWick Repairs
Audio Doctor
Vintage Electronics Repair
MCM Electronics
Politicalchat.org
Herbies Audio Lab
Antique Radio Classifieds
 
Videokarma.org
   
Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
ęCopyright 2002-2014 AudioKarma.org, All rights reserved.