[sdiy] Re: Source of 2N5459 FETs

[Dana Scott]

Hi,
The FET's in that circuit are the selected ( orange) ones. 2n5459's have a wide
spec on pinch-off voltage. The orange ones are selected for a pinch-off of 5V or
less, the yellow coded ones are the rejects. the 2n4392's will work well in the
4035 circuit as their pinch-off voltage is always less than 5V.
The VCO I am referring to is the standard 4027-1 circuit used in 2600's . Same
circuit was used in Axxe and later Ody's.
-Dana

----- Original Message ----- 
From: "Steven Downhill" <Steven.Downhill at brother.co.uk>
To: "'Dana Scott'" <
Cc: <synth-diy at dropmix.xs4all.nl>
Sent: Thursday, March 18, 2004 4:21 AM
Subject: RE: [sdiy] Re: Source of 2N5459 FETs


> Hi Dana,
>
> >What are you building? If you are building ARP VCO circuit, you will have
> better
> >luck using a 2n4392. It does come  in a metal can instead of a plastic,
> tho'.
> >-Dana
>
> The plan was to use them in the ARP 4035 VCF (assuming the below schematic
> is OK).
>
> http://www.arptech.synth.net/pdf/4035.pdf
>
> Thanks for the info on the ARP VCO.
> Which version of it are you referring to?.
>
> Regards
> Steven
>
> -----Original Message-----
> From: Dana Scott
> Sent: 17 March 2004 17:45
> To: Steven Downhill; synth-diy at dropmix.xs4all.nl
> Subject: Re: [sdiy] Re: Source of 2N5459 FETs
>
>
> What are you building? If you are building ARP VCO circuit, you will have
> better
> luck using a 2n4392. It does come  in a metal can instead of a plastic,
> tho'.
> -Dana
>
> ----- Original Message ----- 
> From: "Steven Downhill" <Steven.Downhill at brother.co.uk>
> To: <synth-diy at dropmix.xs4all.nl>
> Sent: Wednesday, March 17, 2004 9:31 AM
> Subject: [sdiy] Re: Source of 2N5459 FETs
>
>
> > Hi All,
> >
> > Does anybody know of a company in the UK with the exception of RS that I
> can
> > obtain 2N5459 FETs from?.
> > (RS seem the only company to have this part and they'll be out of stock
> for
> > the next 10 weeks!).
> >
> > Equivalent part suggestions are also welcome.
> >
> > Thanks.
> >
> > Regards
> > Steven