Thorens TD126 oscillator lamp - diyAudio
Go Back   Home > Forums > Source & Line > Analogue Source

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

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 7th July 2007, 10:02 AM   #1
diyAudio Member
 
ashok's Avatar
 
Join Date: Jun 2002
Location: 3RS
Default Thorens TD126 oscillator lamp

The amplitude control lamp in the oscillator circuit of my TD126 turntable has fallen off due to corrosion of the leads.
Would anyone know what it's ratings are ? I guess I will have to search for a similar part here . Any ideas ?
I've attached a picture. Cold resistance seems to be 85 ohms.

Know any sources ?
Thanks.
Ashok.
Attached Images
File Type: jpg td126 lamp.jpg (28.1 KB, 179 views)
__________________
AM
  Reply With Quote
Old 7th July 2007, 10:27 AM   #2
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
dunno for sure, but you can try at auto store and check every little bulb in range of 1-2W .

I really don't know much about TD126.........
__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa... by Mighty ZM
  Reply With Quote
Old 7th July 2007, 10:50 AM   #3
diyAudio Member
 
Join Date: Feb 2006
Location: Willy, VIC
The equivalent lamp in the TD125 mk II is 6V 20 mA so that's where I'd start. These are commonly called "grain of wheat" globes and should be available at your local electronics shop.
  Reply With Quote
Old 7th July 2007, 10:58 AM   #4
diyAudio Member
 
ashok's Avatar
 
Join Date: Jun 2002
Location: 3RS
Thanks Mark.
I checked the TD125 manual an hour ago and discovered the lamp was 6V 20mA . But then I'm still not sure. I can however try to see what I can get in the market. The filament structure should indicate if its useful. This one has a very thin filament compared to some 6V lamps I have seen.

Right now I've decided to try and resolder an external copper wire to the small stubs ( maybe 0.2mm ) that are still there. It couldn't possibly cause any more damage. If it works , I can glue the new wires to the body and then it should last another 10 years ! It will give me enough time to find a suitable replacement.

Thanks.
Ashok.
__________________
AM
  Reply With Quote
Old 9th July 2007, 01:09 PM   #5
diyAudio Member
 
Join Date: Mar 2007
Location: Canandaigua, NY USA
That looks a lot like the somewhat old fashioned bulbs used in telephone equipment and some electronic test equipment. They usually have metal contact glued to each side so the bulb can be pushed into a socket. They come in all sorts of voltages and currents. You need a bulb catalog, Chicago Miniature Lamp or similar, then order something suitable from one of the distributors. Pull the metal contact off each side and solder it in. That would give you something that looked like the original installation, if you're into that sort of thing- I like my repairs to be invisible
  Reply With Quote
Old 9th July 2007, 02:27 PM   #6
diyAudio Member
 
ashok's Avatar
 
Join Date: Jun 2002
Location: 3RS
Hi Conrad and others,
The possibility of getting minature bulbs in our shops is almost nill. However "old" shops sometimes have ancient stuff stashed away. I went to one of those and he had a box full of tiny lamps and no specs on anyone of them. Most were with leads on them. I picked two each of five different types ( shapes and lead outs !) for about 50 cents !
At home I found one which had a cold resistance of about 45 ohms which was the highest of the lot. I put it in and the circuit is working again.
So I got the platter working with correct voltages and speed.
Now I find the arm is sticking very gently , half way down the disc causing it to get stuck there . I can lift it and move it across the album without it appearing to stick significantly.
So it's back to trying to fix that.

Will anyone have the instruction manual for the TD126MkII ? The one I found on the web has very blurred diagrams that I can't read the part numbers.
I want to know how to change the tone arm height. It appears to be too low. In fact I need to have the instructions on how to set up the tone arm.

Will be extremely grateful if anyone can help out with this. I will attach a picture in a few minutes of the tone arm. It is a Thorens tone arm with no headshell as such. The finger lift is the cartridge carrier and can slide on the tone arm. Looks rather flimsy to me !
Thanks again.

Cheers.
Attached Images
File Type: jpg thorens tone arm.jpg (33.7 KB, 134 views)
__________________
AM
  Reply With Quote
Old 15th July 2007, 08:03 PM   #7
kevinkr is offline kevinkr  United States
diyAudio Moderator
 
kevinkr's Avatar
 
Join Date: Sep 2004
Location: Boston, Massachusetts
Blog Entries: 6
Check the VinylEngine forum to see whether or not they have a manual for your TD126. Also given this is the turntable forum of choice I'd join and post your queries there as well.

http://www.vinylengine.com/
__________________
"Extraordinary claims require extraordinary evidence." - Carl Sagan
  Reply With Quote
Old 16th July 2007, 04:47 PM   #8
kevinkr is offline kevinkr  United States
diyAudio Moderator
 
kevinkr's Avatar
 
Join Date: Sep 2004
Location: Boston, Massachusetts
Blog Entries: 6
Manuals for the TD-126 can be found here:

http://www.theanalogdept.com/manuals.htm
__________________
"Extraordinary claims require extraordinary evidence." - Carl Sagan
  Reply With Quote
Old 16th July 2007, 05:00 PM   #9
diyAudio Member
 
ashok's Avatar
 
Join Date: Jun 2002
Location: 3RS
Thanks.
I did get those sites for the manuals. However they are for the TD126 MkI-III. Mine is a Mk-II .
The Vinyl Engine has a manual but its diagrams are unreadable.
The circuit of the Mk-II is also different from the Mk-II. I suspect the tone arm is similar except for the 'arm wand'.

Anyway, I fixed the motor drive oscillator problem and also the motor tilt adjustment problem. So the platter is now fully functional.
I have to fix the tone arm . It sticks lightly at one point and it needs a height adjustment. I bought a manual from Thorens but that is also for the Mk-III. Will need to study it closely.
Cheers.
__________________
AM
  Reply With Quote
Old 19th July 2007, 05:13 AM   #10
diyAudio Member
 
ashok's Avatar
 
Join Date: Jun 2002
Location: 3RS
OK , I got the tonearm height adjustment figured out.
However the lift mechanism now doesn't seem to reach the arm .

I could live with that , but must try to see if it can be fixed later on. I was hoping someone who has a 126MkII with the original tone arm might respond. This seems to be a really flimsy way to fix the cartridge unless appearances are deceptive.

Wonder if I can get an arm from the TD126 Mk III. I couldn't find one at eBay. I need just the wand and not the whole arm.

Cheers.
__________________
AM
  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
Use of a Ribidum Oscillator as refrence oscillator in a DAC Mark A. Gulbrandsen Digital Line Level 19 2nd November 2014 03:35 AM
Thorens TD126 MKII lpd Swap Meet 0 8th September 2007 02:02 AM
repairing adjust Thorens TD125 wein bridge oscillator pjpoes Analogue Source 15 27th December 2006 06:10 PM


New To Site? Need Help?

All times are GMT. The time now is 04:53 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