FET Equivalent required

T

timbo

Guest
Hi,

need an equivalent for a SPF558 N-channel FET, havent been able to locate
any info on it via google, hoping someone here might have an old data book
with a few specs to give me some idea of what to replace it with. It's in an
old Peavey Deuce guitar amp.

thanks,

tim.
 
"timbo"
need an equivalent for a SPF558 N-channel FET, havent been able to locate
any info on it via google,
Click to expand...
** That would be because the part number is a Peavey " in house " one.

Means it is a selected part.


hoping someone here might have an old data book
with a few specs to give me some idea of what to replace it with.
Click to expand...

** No published data exists.

It's in an old Peavey Deuce guitar amp.
Click to expand...

** Comes right after the treble control ( in each channel) - right ?

You have two options:

1. Contact the Peavey importer;

http://www.audioproducts.com.au/ContactUs.aspx


2. Buy a few 2N5459s and try them.

When you get the drain pin to sit at about 10 to 12 volts DC - you have it.

Possibly trim the value of the 15k in the path from source to ground.



...... Phil
 
"Phil Allison"

2. Buy a few 2N5459s and try them.
Click to expand...


** You can also use 2N5457s or MPF105s.

Try Farnell or eBay for 2N5459s.




...... Phil
 
"timbo"
Phil Allison
** You can also use 2N5457s or MPF105s.

Try Farnell or eBay for 2N5459s.



Thanks Phil. I've put in a request with the aussie importer, we'll see if
i
get a reply any time soon.. meanwhile, i'll give you other suggestions a
go.
Click to expand...
** " PTMe " here in Sydney is advertising 10 x 2N5459s for 99c on eBay
now.

Old stock for sure ( left over from making PTM brand amplifiers ) but likely
perfect.

A lifetime supply for $1 plus post is OK.




....... Phil
 
On 2008-07-23, Phil Allison <philallison@tpg.com.au> wrote:
"Phil Allison"

2. Buy a few 2N5459s and try them.



** You can also use 2N5457s or MPF105s.

Try Farnell or eBay for 2N5459s.




..... Phil
Click to expand...
Thanks Phil. I've put in a request with the aussie importer, we'll see if i
get a reply any time soon.. meanwhile, i'll give you other suggestions a go.

cheers,

tim.
 
On 2008-07-23, Phil Allison <philallison@tpg.com.au> wrote:
"timbo"
Phil Allison

** You can also use 2N5457s or MPF105s.

Try Farnell or eBay for 2N5459s.



Thanks Phil. I've put in a request with the aussie importer, we'll see if
i
get a reply any time soon.. meanwhile, i'll give you other suggestions a
go.


** " PTMe " here in Sydney is advertising 10 x 2N5459s for 99c on eBay
now.

Old stock for sure ( left over from making PTM brand amplifiers ) but likely
perfect.

A lifetime supply for $1 plus post is OK.
Click to expand...
not bad at all.


just got a reply from Audio products Group:

Part Number 70405951
Description 2N5951 FET TRANSISTOR 30V N-CH

Availability IN STOCK

Price $22.50 ex GST

Freight $8.00 ex GST


Ouch!

apart from a 25Vdg/gs vs 30Vdg/gs, the 2N5459 looks like a pretty close match.

better get on ebay methinks..

thanks Phil.

cheers,

tim.
 
"timbo" <tim@nospam-number26.org> wrote in message
news:g66t7i$m3r$1@birgitte.twibble.org...
On 2008-07-23, Phil Allison <philallison@tpg.com.au> wrote:

"timbo"
Phil Allison

** You can also use 2N5457s or MPF105s.

Try Farnell or eBay for 2N5459s.



Thanks Phil. I've put in a request with the aussie importer, we'll see
if
i
get a reply any time soon.. meanwhile, i'll give you other suggestions a
go.


** " PTMe " here in Sydney is advertising 10 x 2N5459s for 99c on eBay
now.

Old stock for sure ( left over from making PTM brand amplifiers ) but
likely
perfect.

A lifetime supply for $1 plus post is OK.


not bad at all.


just got a reply from Audio products Group:

Part Number 70405951
Description 2N5951 FET TRANSISTOR 30V N-CH

Availability IN STOCK

Price $22.50 ex GST

Freight $8.00 ex GST


Ouch!

apart from a 25Vdg/gs vs 30Vdg/gs, the 2N5459 looks like a pretty close
match.

better get on ebay methinks..

thanks Phil.

cheers,

tim.
Click to expand...
Still, at least they told you the type number.
 
On 2008-07-27, ian field <dai.ode@ntlworld.com> wrote:
"timbo" <tim@nospam-number26.org> wrote in message
news:g66t7i$m3r$1@birgitte.twibble.org...
On 2008-07-23, Phil Allison <philallison@tpg.com.au> wrote:

"timbo"
Phil Allison

** You can also use 2N5457s or MPF105s.

Try Farnell or eBay for 2N5459s.



Thanks Phil. I've put in a request with the aussie importer, we'll see
if
i
get a reply any time soon.. meanwhile, i'll give you other suggestions a
go.


** " PTMe " here in Sydney is advertising 10 x 2N5459s for 99c on eBay
now.

Old stock for sure ( left over from making PTM brand amplifiers ) but
likely
perfect.

A lifetime supply for $1 plus post is OK.


not bad at all.


just got a reply from Audio products Group:

Part Number 70405951
Description 2N5951 FET TRANSISTOR 30V N-CH

Availability IN STOCK

Price $22.50 ex GST

Freight $8.00 ex GST


Ouch!

apart from a 25Vdg/gs vs 30Vdg/gs, the 2N5459 looks like a pretty close
match.

better get on ebay methinks..

thanks Phil.

cheers,

tim.

Still, at least they told you the type number.
Click to expand...
yep. handy that :)

cheers,

tim.
 
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