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Re: LF: SAQ

To: [email protected], [email protected]
Subject: Re: LF: SAQ
From: "Roelof Bakker" <[email protected]>
Date: Tue, 03 Jul 2018 14:24:25 +0200
In-reply-to: <[email protected]>
References: <A905714CEEED4F84A38B62B60939952A@MPC>, <[email protected]>, <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
Hello Joe,

The design is slightly different.
I use now 2 J310's parallel and Rs = 560 ohm.
Supply voltage can be anything between 4 and 20 V, whilst the current draw is 7 
mA.

The output transformer is wound bifilar on a FT-37-43 with 20 turns, but a high 
mu toroid will 
work equally well. A BN-73-202 binocular core with 10 bifilar turns can also be 
used.

VLF performance can be enhanced by increasing the 1M gate resistor to 10M or 
higher.

73,
Roelof, pa0rdt


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