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-   -   Dynatron Elan; transistor substitutes. (https://www.vintage-radio.net/forum/showthread.php?t=12950)

Superhet Si 29th Nov 2006 8:25 pm

Dynatron Elan; NKT transistor substitutes.
 
I have just purchased a Dynatron Elan for a measly sum of 1. Problem is, the set suffers some serious noise in the output stage. The fault seems to be coming from mainly TR5 which is a NKT 775:shrug:
Never heard of it!

Could someone suggest an equivalent transistor please? Are these types any trouble?

ronbryan 29th Nov 2006 8:53 pm

Re: Dynatron ELAN
 
AC127

Ron

Superhet Si 30th Nov 2006 9:14 pm

Re: Dynatron ELAN
 
A BC107 works a treat. Total silence except for the wanted sounds!

ppppenguin 30th Nov 2006 9:20 pm

Re: Dynatron ELAN
 
Quote:

Originally Posted by Superhet Si (Post 90937)
A BC107 works a treat. Total silence except for the wanted sounds!

Which just shows how uncritical transistor subs can be. Beware that the BC107 is only rated at 100mA while I think the NKT775 is 300mA. If it works, doesn't overheat and runs at about the right collector current then it's fine. I mentioned collector current because the bias may need to be rather different for a silicon part.

Superhet Si 1st Dec 2006 6:53 pm

Re: Dynatron ELAN
 
Thanks Jeffrey. The 107 seems cool and the radio sounds great. A realy nice warm sounding set this one.


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