Greeting fm Down Under.. I sent out a request to this group as below, but being out of circulation for the last 3 weeks, I can now expand on my findings, and perhaps an answer to Geoff Pike and today Ted Sims at tedsims dot com ...wrote in a private mail: Anyway, do you still need help with this? What kind of test equipment do you have? What's the reason for wanting to change to the BF988? The 3SK174 is a fine transistor.
Jerry Vogt wrote: > We do have some 3SK174's available now for $16.50. They can also supply the BF988 for the same price. Huh??!! If the 3SK174 is obsolete but priced at US$16.50 +PnP why do they list the BF988 at the same price. I've since sourced the BF988 locally. My query was based on the following: The 3SK174 is a dualgate MESFET The BF988 is a dualgate MOSFET I could rave on, but the main concern was the suggestion that the BF988 can replace a 3SK174 but some retuning is necessary. 73 John VK4JKL -------- Original Message -------- Subject: 3SK174 vs BF988 Date: Fri, 05 Sep 2008 08:02:41 +1000 From: jgielis <[EMAIL PROTECTED]> To: Repeater group <Repeater-Builder@yahoogroups.com> Hi, can someone expand on the procedure for retuning a HRG-(VHF) helical resonator when the 3SK174 is replaced with a BF988. I have recently sent an email to Hamtronics requesting further info on their suggestion (on their webpage) that states "It may require some retuning", but as yet there has been no response, except to suggest that they can source both FET's. 73 John VK4JKL IRLP 6163
