2SC2166 Driver replacement?

[Matt Palmer-4]

Again I invoke the elecraft gods, i dont have a 2sc2166, mine is a
2sc5739, checking the data sheets these are the same except they have
lower voltage, current and power dissapation rating, is this a
documented replacement? I would have expected it to show up in errata
somewhere... Just want to make sure its still ok before i tag it down.


Matt KD8DAO
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[Don Wilhelm-4]

Matt,

Put the 2SC5739 in the Q6 position - it will be just fine.
Sorry about the lack of an update for the Errata sheet (we can probably
blame it on the K3 preparation and resulting overtime at Elecraft).  If
I can guess a bit, the change was part of the switch to RoHS compliant
devices, but that is only a guess.

73,
Don W3FPR

Matt Palmer wrote:
> Again I invoke the elecraft gods, i dont have a 2sc2166, mine is a
> 2sc5739, checking the data sheets these are the same except they have
> lower voltage, current and power dissapation rating, is this a
> documented replacement? I would have expected it to show up in errata
> somewhere... Just want to make sure its still ok before i tag it down.
>
>  
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[WA7CS]

 My new K1 seems to have a replacement final as well.  I'm going to make a leap of faith and solder in the undocumented 2SC5739 in place of the specified 2SC2166.

Carl
WA7CS

PS:  K1 serial Number 2476 is alive and listening - Transmitter installation underway!

Don Wilhelm wrote

Put the 2SC5739 in the Q6 position - it will be just fine.
Sorry about the lack of an update for the Errata sheet (we can probably
blame it on the K3 preparation and resulting overtime at Elecraft).  If
I can guess a bit, the change was part of the switch to RoHS compliant
devices, but that is only a guess.

73,
Don W3FPR

Matt Palmer wrote:
> Again I invoke the elecraft gods, i dont have a 2sc2166, mine is a
> 2sc5739, checking the data sheets these are the same except they have
> lower voltage, current and power dissapation rating, is this a
> documented replacement? I would have expected it to show up in errata
> somewhere... Just want to make sure its still ok before i tag it down.