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Autobias OTL....Any thoughts?
Autobias OTL....Any thoughts?
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Old 17th January 2012, 10:56 AM   #41
Alastair E is offline Alastair E  Wales
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Or you can use no limiter, apply HT and heaters at turn-on and watch the house-lights 'twitch' when you turn it on--like I do!
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Old 17th January 2012, 11:05 AM   #42
M Gregg is offline M Gregg  England
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Originally Posted by Alastair E View Post
Or you can use no limiter, apply HT and heaters at turn-on and watch the house-lights 'twitch' when you turn it on--like I do!
A long time ago I used a keynector (safebolck) without inrush, on first close of the block it (power on) the lights dipped and the amp ran ok. Then I tried swiching it off..the block was welded permanently on...

It was a good one never got it appart again..LOL

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Old 17th January 2012, 11:15 AM   #43
flatheadmurre is offline flatheadmurre  Sweden
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Are we building DIY spotwelders today ?

Shame on you guys, no low tech solutions we have to put some sand in the amp .
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Old 17th January 2012, 11:17 AM   #44
M Gregg is offline M Gregg  England
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Originally Posted by florindo View Post
what termistor rating should i mount in this case?
In series with the primary I used CL60..you can put 2 in series depends on your mains voltage..And a MOV across the Tx..

Or make circuits like Mr Murre's modules...


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Old 17th January 2012, 11:19 AM   #45
M Gregg is offline M Gregg  England
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Originally Posted by flatheadmurre View Post
Are we building DIY spotwelders today ?

Shame on you guys, no low tech solutions we have to put some sand in the amp .

LOL..who said sand?? What where...

Er resistors and relays...me thinks..LOL Bi metal strips and resistors...



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M. Gregg
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Old 17th January 2012, 11:40 AM   #46
flatheadmurre is offline flatheadmurre  Sweden
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B+ delay old style

Click the image to open in full size.

No sand in sight .

Bonus points for octal socket.
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Old 17th January 2012, 03:31 PM   #47
M Gregg is offline M Gregg  England
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You win..LOL

10/10....octal base as well...


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Old 17th January 2012, 03:47 PM   #48
flatheadmurre is offline flatheadmurre  Sweden
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I think i have some of those old ballast tubes to if you want an stoneage CCS.
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