[Elecraft] Part substitution & transistor/FET spec list

[Steve Finch]

I use the NTE Electronics cross reference.  I find that many transistors can
be substituted by several alternatives.

http://nte01.nteinc.com/nte/NTExRefSemiProd.nsf/$$Search?OpenForm

Steve Finch, AIØW
Bailey, CO
ai0w at arrl.net




-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Bill Hammond
Sent: Tuesday, December 08, 2009 2:01 PM
To: Kevin Rock
Cc: elecraft at mailman.qth.net; qrp-l at mailman.qth.net
Subject: Re: [Elecraft] Part substitution & transistor/FET spec list

Usually a quick Google search will return several choices.  Search for  
"2NXXXX substitution". I tried it and got several choices.  You can  
usually search for the exact device and get the entire specification  
to compair.
73,
AK5X

Sent from my iPhone

On Dec 8, 2009, at 2:00 PM, Kevin Rock <kevinrock at earthlink.net> wrote:

> I am working my way through Wes Hayward's book "EMRFD" along with  
> Doug DeMaw's book "W1FB's QRP Notebook" and am creating a new part  
> order.  Yes, I will receive discrete parts for my Christmas  
> present.  Since I needed something to put under the tree a nice box  
> from Mouser would look just fine.  However, I have run into an  
> impasse.  I need some 2N4416s and some BB104s and find them either  
> as scarce as hen's teeth or dear enough to make Croesus cringe.   
> Thus my request from this auspicious group.  Audacious may be more  
> accurate :) but I digress.  Long ago (circa 1969) I had a manual for  
> substitutions of various transistors.  Said manual held substitution  
> charts and specs for a variety of bipolar transistors.  I was  
> wondering if there are any online sources of material similar to  
> this manual.  Barring that could anyone offer some available and  
> inexpensive (think cheap, I am a radio amateur and there are  
> traditions to uphold!) parts which would fit into the circuits I am  
> trying t
> o craft without too much bias fiddling, reactance matching, or other  
> such work arounds.  I have some BB105s on the way from W0EB but they  
> do not have the range of the BB104s (24 - 42 pF as compared to ~1.8  
> - 2.8 pF)  Varactors seem to be getting as scarce as the old  
> fashioned variable capacitors unless one wants SMT.  Soon I will be  
> using more SMT but for now I would like to have larger parts.
>
> My queries:
> 1) A varactor with a range similar to the BB104 in a leaded form.   
> If leaded is not available I will go with SMT.
> 2) Lists of transistors and FETs with fT and power ratings, etc.  I  
> want to explore VHF and UHF VFOs even though I do not hope to tame  
> one.  Much like tilting at windmills impossible challenges are  
> interesting and pleasurable pursuits.  I am not mad (at least that  
> is what the voices told me :)
>   Thank you for any assistance offered.
>      73,
>         Kevin.  KD5ONS
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