Marantz PM66 KI tweeks - Page 47 - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 1st January 2012, 08:12 PM   #461
diyAudio Member
 
Ben Hanke's Avatar
 
Join Date: Dec 2007
Location: Vancouver, BC
Send a message via MSN to Ben Hanke Send a message via Skype™ to Ben Hanke
Hmmm... OK, I'm going to cool my jets on that one then. The amp's sounding great as it is, so I'd do well to not risk breaking it again. The bridge was well worth it though.
__________________
Modified Marantz CD63KI -> Modified PM66KI -> B&W 805S
  Reply With Quote
Old 1st January 2012, 08:15 PM   #462
diyAudio Member
 
Ben Hanke's Avatar
 
Join Date: Dec 2007
Location: Vancouver, BC
Send a message via MSN to Ben Hanke Send a message via Skype™ to Ben Hanke
btw the transistors seem identical quality. I bought them at the same time for the same price from Farnell and the packing label is the only indication that the manufacturer is different.
__________________
Modified Marantz CD63KI -> Modified PM66KI -> B&W 805S
  Reply With Quote
Old 7th February 2012, 05:41 PM   #463
diyAudio Member
 
Ben Hanke's Avatar
 
Join Date: Dec 2007
Location: Vancouver, BC
Send a message via MSN to Ben Hanke Send a message via Skype™ to Ben Hanke
Hey guys, I forgot to say - just before I broke my amp, I was experimenting with PSU bypass caps without much luck. When I rebuilt it, I ended up drilling the PCB and adding 100uF/100v BG FKs across the main smoothers. I've been running with these for a few weeks now and I'm really happy with this combination. The overall character is the same, but it sounds more detailed. There's none of the harshness I got from trying other caps. I'm tempted to try tagging some Mundorf Supremes across too now.
__________________
Modified Marantz CD63KI -> Modified PM66KI -> B&W 805S
  Reply With Quote
Old 19th October 2012, 04:47 PM   #464
nuryev is offline nuryev  Australia
diyAudio Member
 
Join Date: Aug 2007
Default Your mods

Hi Ben,
Where did you get your 56v 22000uF caps and the torroidal? I would like to try the mods in my PM66 KI.
__________________
NYV
  Reply With Quote
Old 19th October 2012, 06:33 PM   #465
diyAudio Member
 
Ben Hanke's Avatar
 
Join Date: Dec 2007
Location: Vancouver, BC
Send a message via MSN to Ben Hanke Send a message via Skype™ to Ben Hanke
Hey Nuryev,

My smoothing caps are 80v 10,000uF Black Gates, which are out of production and very rare. If I didn't have those then I think I'd buy some 80V 22,000uF Mundorf M-Lytic HC from Parts Connexion.

I got the second transformer by cannibalising a faulty KI amp that I bought on eBay.

Ben
__________________
Modified Marantz CD63KI -> Modified PM66KI -> B&W 805S
  Reply With Quote
Old 29th October 2012, 03:22 PM   #466
nuryev is offline nuryev  Australia
diyAudio Member
 
Join Date: Aug 2007
Hi Ben
Thanks for the reply. After looking around for ki tx and suitable caps I found 22000uf 63v Kendeil caps which appear highly rated. I have replaced most of the caps with Black Gates and was wondering would investing in the larger caps be worth the cost and effort without the transformer or until I source a KI transformer?

Would I have to change any other parts on the pcb if I go ahead with the cap upgrade?
__________________
NYV
  Reply With Quote
Old 29th October 2012, 04:31 PM   #467
diyAudio Member
 
Ben Hanke's Avatar
 
Join Date: Dec 2007
Location: Vancouver, BC
Send a message via MSN to Ben Hanke Send a message via Skype™ to Ben Hanke
No Roy, they'd just be a straight swap. Those Kendeil caps look nice - I'd say go for it.
I recommend getting some short lengths of good quality wire like Kimber 4TC. It's just the right gauge to fit through the existing PCB holes. I think the in-rush current should be OK at 22,000uF but you might want to pick up some spare fuses just in case.
__________________
Modified Marantz CD63KI -> Modified PM66KI -> B&W 805S
  Reply With Quote
Old 14th November 2012, 11:57 AM   #468
nuryev is offline nuryev  Australia
diyAudio Member
 
Join Date: Aug 2007
Default Hiccup

Hi Ben

The Kendeil caps have arrived as have the brackets and the Kimber cable :-).
After removing the original 50v Caps and cleaning the junk/glue off the board I accidently damaged a resistor (RN12). The part list describes the replacement as being 100K00 1% 0.4W resistor. I have a bag of spares from my cd mods and amp channel rebuild stock. The specific resistor i have on hand is Farnell (Element 14) Part no 337-419 Res 100K 1% 0.75w.

My question(s):
1) Is this part suitable to replace the original? And, if so..
2) Would I have to make any other component adjustments?

OR
the parts are really cheap..
3) Should I just place an order for some that is up to spec of the original resistor?

Thanks
__________________
NYV
  Reply With Quote
Old 14th November 2012, 03:19 PM   #469
diyAudio Member
 
Ben Hanke's Avatar
 
Join Date: Dec 2007
Location: Vancouver, BC
Send a message via MSN to Ben Hanke Send a message via Skype™ to Ben Hanke
I'm no expert, but I think it will be fine to use the one you've got. It's the same value with a higher rating. It's possible that the original is carbon and the replacement metal film, but I doubt it will make any audible difference.
__________________
Modified Marantz CD63KI -> Modified PM66KI -> B&W 805S
  Reply With Quote
Old 3rd December 2012, 04:47 PM   #470
diyAudio Member
 
Join Date: Sep 2012
Hi Guys, posted in another thread a while back but had no luck!

I had the problem of the power LED coming on and no clunk, so I opened up my amp, replaced both the 47R that are known to go and also a 1.2k that looked very charred.

Now my amp turns on, does the "clunk" but still refuses to have any output.


Does anyone have the slightest idea what may be causing this? This is my first ever project and it's stumped me!
  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
Marantz PM66 se problems, information wanted alan_w Solid State 8 6th August 2012 05:13 PM
Quad II Mods/Tweeks slurb.net Tubes / Valves 62 16th June 2012 12:32 AM
wanted marantz pm66 amp paul.42 Swap Meet 0 6th April 2009 08:09 PM
Tweeks on tubes - bring out the demagnetiserss ashok Tubes / Valves 36 3rd August 2004 05:34 PM
expert tweeks for PA? Pbassred Multi-Way 4 7th December 2003 08:57 PM


New To Site? Need Help?

All times are GMT. The time now is 02:59 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