Kenwood L-07M info needed please - 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 29th March 2006, 06:38 AM   #1
diyAudio Member
 
georgehifi's Avatar
 
Join Date: Sep 2003
Location: Manly Australia (Jewel of the Pacific)
Send a message via MSN to georgehifi
Default Kenwood L-07M info needed please

I have a pair but alas no circuit diagram, they are both working fine and show good 50k square waves stable on the scope and have equal low noise, but one is warm and the other is cool, so i need to do a bias adjustment, and also dc offset adjustment.

I've found 3 pots on the input/driver board, which I have no idea which ones what. One has to be for bias which i need to do, the other for DC offset which i also need to do and the third I have no idea what it does.
Does anyone have the info or a diagram on which does what. It's so dark and dingy down in there and cramped, I can't even see the emitter resistors so i can check the bias across them.

Your help will be grateful
Cheers George
__________________
Avatar : Production Lightspeed Attenuator
www.lightspeedattenuator.com
  Reply With Quote
Old 29th March 2006, 05:13 PM   #2
diyAudio Member
 
Join Date: Jan 2006
Location: Virginia
I might have one, I'll look when I get home.
  Reply With Quote
Old 29th March 2006, 10:53 PM   #3
diyAudio Member
 
georgehifi's Avatar
 
Join Date: Sep 2003
Location: Manly Australia (Jewel of the Pacific)
Send a message via MSN to georgehifi
That would be great Mike, I've sent you a PM so you have my email, save trying to post, with the 100k limit.
Just found out that it has to go through the administrators to get to you, I'll give it a go.
Cheers George
__________________
Avatar : Production Lightspeed Attenuator
www.lightspeedattenuator.com
  Reply With Quote
Old 30th March 2006, 01:42 PM   #4
diyAudio Member
 
Join Date: Jan 2006
Location: Virginia
George,

I have manuals for both the L-07M and the L-07M II. I did not receive a PM. The adjustments include: VRe1, fine offset adj; VRe2, course offset adj; VRe3, bias adj. The major differences between the two models appears to be the II version went to higher frequency outputs, they went to a double Darlington from a tripple and the bias compensation went from six diodes to one, with changes to the trimmer values.

Regards, Mike.
  Reply With Quote
Old 30th March 2006, 02:29 PM   #5
tvi is offline tvi  Australia
diyAudio Member
 
tvi's Avatar
 
Join Date: Apr 2001
Location: Moonee Ponds, Vic, Australia
Just uploaded the sevice manual and a seperate schematic at
www.sharefx.com

Regards
James
  Reply With Quote
Old 30th March 2006, 08:37 PM   #6
diyAudio Member
 
georgehifi's Avatar
 
Join Date: Sep 2003
Location: Manly Australia (Jewel of the Pacific)
Send a message via MSN to georgehifi
Thanks Mike, that will get me out of trouble.

And thanks for the link James will d/l, good site to have in favourites.

Cheers George
__________________
Avatar : Production Lightspeed Attenuator
www.lightspeedattenuator.com
  Reply With Quote
Old 30th March 2006, 10:16 PM   #7
anatech is offline anatech  Canada
diyAudio Moderator
 
anatech's Avatar
 
Join Date: Jun 2004
Location: Georgetown, On
Hi James,
I just had a look on the link, couldn't find the information. Does it disappear when someone downloads it?

-Chris
  Reply With Quote
Old 31st March 2006, 04:38 AM   #8
clem_o is offline clem_o  Philippines
diyAudio Member
 
Join Date: Jun 2005
Location: Manila
Chris,

It's there. The default filter is set to "today", just set it to "all", ctrl-f to look for "L-07".

Cheers

Clem

ps: I haven't figured out how to download though... but I use Opera, it doesn't seem to work with some sites...
  Reply With Quote
Old 31st March 2006, 02:22 PM   #9
anatech is offline anatech  Canada
diyAudio Moderator
 
anatech's Avatar
 
Join Date: Jun 2004
Location: Georgetown, On
Hi Clem,
Thanks very much for the hint.

The rest is easy, register. A bit on the right you will seen a kind of down arrow, click it and the PDF opens in a new window.

So I did find and download the manual. A little unclear but way better than nothing.

James,
Thank you.

-Chris
  Reply With Quote
Old 1st April 2006, 02:36 PM   #10
clem_o is offline clem_o  Philippines
diyAudio Member
 
Join Date: Jun 2005
Location: Manila
Quote:
Originally posted by anatech

Thanks very much for the hint.

The rest is easy, register. A bit on the right you will seen a kind of down arrow, click it and the PDF opens in a new window.


Hi Chris,

Your welcome. So, how many heads does it take to download a PDF... :-) :-) :-)

James, many thanks for the link, I think it will come in handy...

Cheers

Clem
  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
Trio (Kenwood) DP-1000, Any info? GJF Digital Source 63 9th October 2013 10:48 AM
A mint Kenwood KA-907 amp is arriving, I need help/info/advice on restoring it. Kuja Solid State 5 22nd November 2011 12:46 AM
Seeking info: researching the Trio Kenwood L-07D for a magazine article Triophile Analogue Source 4 9th August 2009 06:42 AM
Kenwood Power AMP KM-X1 transformer info space2000 Solid State 0 21st June 2008 12:08 PM
Info needed on this very rare Kenwood deck Kuja Analogue Source 0 29th September 2006 03:19 PM


New To Site? Need Help?

All times are GMT. The time now is 01:15 PM.


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