Double gate FET

[Bill Hennessy]

Does anyone know where I can get a double gate fet like the old 40673?
I know Ocean State has it but it's kind of high $8.50, I know their are
others like the 3N201 and BF900. But can't seem to find them anyplace.

Bill, N5NOB

[Richard Heindel]

Here is a promising link: http://www.electronics-plus.com/Merchant/graphics/surplus/BACKUP6.html
The MFE201 is a good replacement for the old 40673.

Richard WB8KRN

"Bill Hennessy" > wrote in message m...
> Does anyone know where I can get a double gate fet like the old 40673?
> I know Ocean State has it but it's kind of high $8.50, I know their are
> others like the 3N201 and BF900. But can't seem to find them anyplace.
>
> Bill, N5NOB

[Ken Scharf]

Bill Hennessy wrote:
> Does anyone know where I can get a double gate fet like the old 40673? I
> know Ocean State has it but it's kind of high $8.50, I know their are
> others like the 3N201 and BF900. But can't seem to find them anyplace.
>
> Bill, N5NOB
I think they are now over $10 each in Ocean State's newest catalog I
just got in the mail!

I saw a web page somewheres showing that you can simulate a dual gate
mosfet with two jfets in series cascade. J310's work well in this
circuit and they are cheap.

[John Miles]

In article >,
says...
> Here is a promising link: http://www.electronics-plus.com/Merchant/graphics/surplus/BACKUP6.html
> The MFE201 is a good replacement for the old 40673.
>
> Richard WB8KRN
>
> "Bill Hennessy" > wrote in message m...
> > Does anyone know where I can get a double gate fet like the old 40673?
> > I know Ocean State has it but it's kind of high $8.50, I know their are
> > others like the 3N201 and BF900. But can't seem to find them anyplace.
> >
> > Bill, N5NOB
>
>
>

40673s can also still be purchased as the NTE 222.

-- jm

------------------------------------------------------
http://www.qsl.net/ke5fx
Note: My E-mail address has been altered to avoid spam
------------------------------------------------------

[Leon Heller]

"Bill Hennessy" > wrote in message
m...
> Does anyone know where I can get a double gate fet like the old 40673?
> I know Ocean State has it but it's kind of high $8.50, I know their are
> others like the 3N201 and BF900. But can't seem to find them anyplace.

Current dual-gate MOSFETs like the Philips BF991 shouldn't be difficult to
find. Packages are very small though, the BF991 is SOT243B.

73, Leon
--
Leon Heller, G1HSM
http://www.geocities.com/leon_heller

[Gary Morton]

Bill Hennessy wrote:
> Does anyone know where I can get a double gate fet like the old 40673? I
> know Ocean State has it but it's kind of high $8.50, I know their are
> others like the 3N201 and BF900. But can't seem to find them anyplace.
>
> Bill, N5NOB

Bill,

if you don't mind going international, J.Birkett of Lincoln has been
advertising the 40673s for £1.50 (around $2.50?) for the past two months.
Seems a good price to me for a hard to find device. Check out a copy of Radcom
if you can find on over there.

regards...

--Gary

[Eamon Skelton]

Bill Hennessy wrote:
> Does anyone know where I can get a double gate fet like the old 40673? I
> know Ocean State has it but it's kind of high $8.50, I know their are
> others like the 3N201 and BF900. But can't seem to find them anyplace.
>
> Bill, N5NOB

BF961 and BF981. Both well under a $.
See: http://www.grandata.co.uk/

73, Ed. EI9GQ.

--
Remove 'X' to reply by E-mail.
Linux 2.6.7

[Eamon Skelton]

Eamon Skelton wrote:

> See: http://www.grandata.co.uk/

Or closer to home:
http://www.rfparts.com/2sk.html#3sk

73, Ed. EI9GQ.

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Remove 'X' to reply by E-mail.
Linux 2.6.7

[Highland Ham]

> > Does anyone know where I can get a double gate fet like the old 40673? I
> > know Ocean State has it but it's kind of high $8.50, I know their are
> > others like the 3N201 and BF900. But can't seem to find them anyplace.
> >
> > Bill, N5NOB
>
> BF961 and BF981. Both well under a $.
> See: http://www.grandata.co.uk/
==========================
from Mode Components - Birmingham ,UK www.modecomponents.co.uk
BF961 GBP 0.56 equiv. US$ 0.80
BF981 GBP 0.80 equiv. US$ 1.20

Frank GM0CSZ / KN6WH

tnx Ed for grandata website info

[Leon Heller]

"Gary Morton" > wrote in message
...
> Bill Hennessy wrote:
> > Does anyone know where I can get a double gate fet like the old 40673? I
> > know Ocean State has it but it's kind of high $8.50, I know their are
> > others like the 3N201 and BF900. But can't seem to find them anyplace.
> >
> > Bill, N5NOB
>
> Bill,
>
> if you don't mind going international, J.Birkett of Lincoln has been
> advertising the 40673s for £1.50 (around $2.50?) for the past two months.
> Seems a good price to me for a hard to find device. Check out a copy of
Radcom
> if you can find on over there.

Here is their web page:

http://www.zyra.org.uk/birkett.htm

I was in Lincoln once and looked them up - piles of electronic junk, some of
it useful.

Leon
--
Leon Heller, G1HSM
http://www.geocities.com/leon_heller

[Paul Burridge]

On Sat, 19 Jun 2004 22:18:46 -0400, Ken Scharf
> wrote:

>I saw a web page somewheres showing that you can simulate a dual gate
>mosfet with two jfets in series cascade. J310's work well in this
>circuit and they are cheap.

Though not if you buy them from MkV in the UK where they want seven
quid! What's that...$11 for a lousy common JFET. Happily they're
readily available elsewhere for a fraction of that ridiculous price.
Yeah, the cascade solution's good if space permits.

--

"What is now proved was once only imagin'd." - William Blake, 1793.

[Laura Halliday]

Bill Hennessy > wrote in message >...
> Does anyone know where I can get a double gate fet like the old 40673?
> I know Ocean State has it but it's kind of high $8.50, I know their are
> others like the 3N201 and BF900. But can't seem to find them anyplace.
>
> Bill, N5NOB

What sort of project did you have in mind? There
is a reason they don't make 40673s any more, and I
am always slightly suspicious when somebody is
looking specifically for them. At the height of
their popularity, ham projects used 40673 for all
sorts of things. Now, about the only thing people
still do with them is low-noise RF amplifiers
(e.g. BF991).

My supply of BF961/981s came from Cricklewood in London
and Les Cyclades in Paris. Barend Hendriksen have them
too.

Laura Halliday VE7LDH "Que les nuages soient notre
Grid: CN89mg pied a terre..."
ICBM: 49 16.05 N 122 56.92 W - Hospital/Shafte

[Bill Hennessy]

Laura Halliday wrote:
> Bill Hennessy > wrote in message >...
>
>>Does anyone know where I can get a double gate fet like the old 40673?
>>I know Ocean State has it but it's kind of high $8.50, I know their are
>>others like the 3N201 and BF900. But can't seem to find them anyplace.
>>
>>Bill, N5NOB
>
>
> What sort of project did you have in mind? There
> is a reason they don't make 40673s any more, and I
> am always slightly suspicious when somebody is
> looking specifically for them. At the height of
> their popularity, ham projects used 40673 for all
> sorts of things. Now, about the only thing people
> still do with them is low-noise RF amplifiers
> (e.g. BF991).
>
> My supply of BF961/981s came from Cricklewood in London
> and Les Cyclades in Paris. Barend Hendriksen have them
> too.
>
> Laura Halliday VE7LDH "Que les nuages soient notre
> Grid: CN89mg pied a terre..."
> ICBM: 49 16.05 N 122 56.92 W - Hospital/Shafte

A regenerative receiver by useing one of the gates in the normal way.
And the other is used with a pot to controal the voltage and will affect
the regeneration. The FET is acting like a screen-grid tube or
replaceing the tube.

[MillerKE6F]

Send me a SASE and I'll send you a pinch of BR998 dual gate mosfets (better
than 40673, but small surface mount package,, but will still solder down to
0.1 inch spaced pads if a little care is taken.

Bob, KE6F

Bob Miller, KE6F
9655 Appalachian Dr.
Sacramento, CA 95827

73
Bob