From: John Woodgate
Subject: Re: BFY91 - What on earth is this?
Date: Wed, 8 Jan 2003 14:25:27 +0000
Organization: JMWA Electronics Consultancy
Reply-To: John Woodgate
NNTP-Posting-Date: Wed, 8 Jan 2003 19:00:43 +0000 (UTC)
X-Newsreader: Turnpike (32) Version 4.01 <5Z8C9wtxbnpWyFnyfFzqmVF739>
I read in sci.electronics.design that - = krusty = - <firstname.lastname@example.org>
wrote (in <email@example.com>) about 'BFY91 - What on earth
is this?', on Wed, 8 Jan 2003:
>I have a circuit for a masthead preamp that uses a BFY91 tranny, about which
>I can find very little information. I have found that the following are
>BFY92 or 2N2639...2N2644, 2N2913...2N2920.
I don't think that is correct.
>These are dual transistors, whatever that means and they certainly have more
>legs than the normal 3. I think they have six, which would imply that it is
>2 transistors in one package!?
>OK, but, the diagram I have shows only 3 pins being used. Can I then use
>some other transistor? If so, what should I use?
I think the BFY 91 is a single transistor for operation up to 1.5 GHz.
The BFY 90 is a similar device for up to 1 GHz. Did you try a Google
search for 'BFY91'?
>I have attached the circuit diagram.
If you put attachments on newsgroup posts, ISPs strip them off. There
was no attachment on your post.
>BTW - I plan to use this to boost signal reception to my airband receiver.
>(good idea or not?)
Well if it covers the band you want, yes, it will work. But it may not
cover that band.
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk
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