K2 rf board D18

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K2 rf board D18

Dennis Vavra
Hey there Elecraft!  I just noticed that D18 on the back of rf bd got fried. The diode looks melted in the middle,
and is probably not useable. Now here is my question, and I feel silly even to ask, but, can I just go to
Radio Shack and pick up another 1N4148 diode, or is the diode provided by Elecraft specific for this kit.
Dennis Vavra, AD5LY
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Re: K2 rf board D18

Mark J. Schreiner
Hi Dennis,

Sorry to hear about your D18 being fried and/or melted.

1N4148 is an industry standard part number so any other 1N4148 should
work fine for you as a replacement regardless of your source.

They are a very common part, but be prepared to pay nearly an arm and a
leg for this cheap part if you source it from R.S. compared to other
places you could maybe get it.  I have bought packs of 100 at hamfests
fairly cheap just to have on hand, which sure beats the high price you
pay for anything at R.S. (especially lately).  Seems that you sure have
to pay a premium to have instant availability if your own junk box or
parts supply is lacking.  Oh, I've also found that I've had to try going
to maybe three different R.S. stores to find common, or at least what
used to be common, items.  So, good luck!  If/when you do find another
1N4148, not to worry, it will work fine for you.

Mark, NK8Q

Dennis Vavra wrote:

> Hey there Elecraft!  I just noticed that D18 on the back of rf bd got fried. The diode looks melted in the middle,
> and is probably not useable. Now here is my question, and I feel silly even to ask, but, can I just go to
> Radio Shack and pick up another 1N4148 diode, or is the diode provided by Elecraft specific for this kit.
> Dennis Vavra, AD5LY
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
>  http://mailman.qth.net/mailman/listinfo/elecraft   
>
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>
>  

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Re: K2 rf board D18

Geoffrey Mackenzie-Kennedy-2
In reply to this post by Dennis Vavra
Dennis,

As Mark NK8Q has already mentioned a 1N4148 obtained from any source is
suitable. What surprises me is that D18 got fried in the first place if
everything else in the circuit is working properly. It might be wise to buy
some spare diodes in case the fault raises its ugly head again before you
have found the cause.

73,
Geoff
GM4ESD


----- Original Message -----
From: "Dennis Vavra" <[hidden email]>
To: <[hidden email]>
Sent: Sunday, January 21, 2007 2:53 AM
Subject: [Elecraft] K2 rf board D18


Hey there Elecraft!  I just noticed that D18 on the back of rf bd got fried.
The diode looks melted in the middle,
and is probably not useable. Now here is my question, and I feel silly even
to ask, but, can I just go to
Radio Shack and pick up another 1N4148 diode, or is the diode provided by
Elecraft specific for this kit.
Dennis Vavra, AD5LY





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