Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Analogue Source Turntables, Tonearms, Cartridges, Phono Stages, Tuners, Tape Recorders, etc.

Weird Akai 1800l (valve) R2R issue
Weird Akai 1800l (valve) R2R issue
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 9th June 2017, 08:24 AM   #1
mckaymckaymckay is offline mckaymckaymckay  United Kingdom
diyAudio Member
 
Join Date: Oct 2010
Default Weird Akai 1800l (valve) R2R issue

Hey guys,

Ive encountered a strange issue with my R2R last night...

When i first turn it on i get sound from both channels, which sounds great surprisingly. When i record i get sound from both channels too, nice and clear.

However, once i have set it to record, i lose the right channel on playback until i leave the unit switched off for a few hours, then it will come back.

I'm guessing it must have some form of switch to turn the playback section off while recording, and the right channel isnt switching back?

I've swapped the valves around, and changed the pre section for 12ax7, however it still suffers from this strange issue.

Any help appreciated. Its a fantastic unit for its age, so it would be good to get it working properly.
  Reply With Quote
Old 9th June 2017, 08:57 AM   #2
JonSnell Electronic is offline JonSnell Electronic  United Kingdom
diyAudio Member
 
JonSnell Electronic's Avatar
 
Join Date: Dec 2012
Location: The Jurassic Coast, England. GB
If you clean SW1 and SW2 then adjust screw F. That will probably cure your problem. Tarnished contacts are the normal problem. See page 9 of the service manual.
__________________
Support for Fender, Marshall and all Valve Equipment; Audio Innovations, Audiorama FU29, Quad and Leak. www.jonsnell.co.uk
  Reply With Quote
Old 9th June 2017, 09:08 AM   #3
mckaymckaymckay is offline mckaymckaymckay  United Kingdom
diyAudio Member
 
Join Date: Oct 2010
Great thanks, ill give that a shot tonight.
  Reply With Quote
Old 10th June 2017, 11:18 AM   #4
mckaymckaymckay is offline mckaymckaymckay  United Kingdom
diyAudio Member
 
Join Date: Oct 2010
Thanks Jon, that was indeed the issue.

Unfortunately ive encountered a new one whereby the tension wire has snapped, so it looks like ill need to find a new one or manually switch when i want to record.
  Reply With Quote
Old 10th June 2017, 11:37 AM   #5
JonSnell Electronic is offline JonSnell Electronic  United Kingdom
diyAudio Member
 
JonSnell Electronic's Avatar
 
Join Date: Dec 2012
Location: The Jurassic Coast, England. GB
Go to a cycle shop and get some Bowden Cable. Cut it to size and there you are. Gear lever cable inner is about the right size.
__________________
Support for Fender, Marshall and all Valve Equipment; Audio Innovations, Audiorama FU29, Quad and Leak. www.jonsnell.co.uk
  Reply With Quote
Old 10th June 2017, 06:10 PM   #6
mckaymckaymckay is offline mckaymckaymckay  United Kingdom
diyAudio Member
 
Join Date: Oct 2010
Cool, sounds like just the job!
  Reply With Quote

Reply


Weird Akai 1800l (valve) R2R issueHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Sourcing a part for Akai R2R df_genius Analogue Source 0 29th November 2010 01:00 PM
akai 1730d-ss R2R motor wiring Glass_painter Analogue Source 0 19th December 2009 06:07 PM
Akai R2R mikejennens Swap Meet 0 23rd August 2009 06:21 AM
AKAI 1710W R2R, OPT Question? zxx123 Tubes / Valves 0 23rd June 2009 06:18 AM
Parts mined from an AKAI 1800L, what to do? keantoken Tubes / Valves 13 18th March 2009 11:52 PM


New To Site? Need Help?

All times are GMT. The time now is 02:20 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio
Wiki