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Subject: Re: [PolySix] Re: Clone - MG always on by default

From: Jed Jorgensen <jed.jorgensen@gmail.com>
Date: 2014-10-16

Thanks, Don. That is it exactly. You have transistor leg in the wrong hole. Look up the data sheet for the 2N3819 vs the SK30A if you are not following what Don said.

On Thu, Oct 16, 2014 at 7:37 AM, backshall1@bellsouth.net [PolySix] <PolySix@yahoogroups.com> wrote:
 

Have you understood what Jed said about pins being different between the clone board and the original? The clone board is designed for 2N3819 in T1 position, not SK30A. The 2N transistor pins are Drain, Gate, Source, while the SK transistors are Source, Gate, Drain, so you have to bend the pins over to the correct hole if you are using the old original transistor.
 
Don Backshall.
 
Sent: Wednesday, October 15, 2014 5:29 PM
Subject: Re: [PolySix] Re: Clone - MG always on by default
 
 

Thanks Jed! Here's what I have:

t1 SK30A-GR original
pin1: fluctuating voltages
pin2: fluctuating voltages
pin3: 14.97V

t2: 2N3906 new
∗: left side after r76 14.98V
pin1: 2.665V
pin2: 2.115V
pin3: -4.99V

t3: 2SA798 original
pin1:4.99V
pin2:-13.19V
pin3: 5.54V
pin4: 4.99V
pin5: 4.90V

t4: 2N3906 new
pin1: -4.40V
pin2: -4.99V
pin3: -12.69V

t5: 2N3904 new
pin1: -4.99V
pin2: - 4.90V
pin3: - -14V draining to -13V and lower