How do I choose a pair of Ge NKT275 for fuzz face build?

Looking for a particular component or hardware part and you just cannot find it? Got comoonents surplus and want to get rid of it? Post it all here... No sales of working pedals, put these in the 'Seen for sale' section please.

How do I choose a pair of Ge NKT275 for fuzz face build?

Postby Explorerman » 12 Jan 2018, 22:54

I'm about to build a clone of the AM NKT Sunface but am not sure on what to look for in finding a suitable pair of Ge NKT275's. There are a few on eBay however they also say "ASX12D" on them - are these still real NKT275?

The tested specs also have the Hfe as pretty much the same value for both of the matched pairs, whereas I read that Q1 should be 80-90 and Q2 120-140. Will the pairs with a same Hfe value be suitable? Thanks.
Explorerman
 
Posts: 5
Joined: 27 Mar 2016, 02:28
Has thanked: 0 time
Have thanks: 0 time

Re: How do I choose a pair of Ge NKT275 for fuzz face build?

Postby tonyharker » 12 Jan 2018, 23:32

There are no OEM NKT275s available any more.
Any so labelled are other more recently made germanium transistors selected for similar characteristics.
They are mostly in the incorrect case pattern. They will not be made using the same construction method that Newmarket used.
I used to work in my youth for a company which used to use exclusively NKT - Newmarket - transistors and I remember them well.
The nearest type I can find is the AC125 type. so I would try those. There are even two types of case for these. The ones to use are those without a flange and tab but those with a red spot on the case. Best of luck. Tony.
tonyharker
 
Posts: 37
Joined: 23 Jun 2011, 22:50
Has thanked: 5 times
Have thanks: 7 times

Re: How do I choose a pair of Ge NKT275 for fuzz face build?

Postby Explorerman » 13 Jan 2018, 00:47

Thanks Tony, I'm also looking at the 2N404 - would these be suitable?
Explorerman
 
Posts: 5
Joined: 27 Mar 2016, 02:28
Has thanked: 0 time
Have thanks: 0 time


Return to Parts Sourcing & Trading

Who is online

Users browsing this forum: No registered users and 3 guests