Hello Roelof,
U use the 2N5109 like you suggested :-)
Also that J310 Fet.
Also the 470 uH chokes.
I did try to keep it orginal as you did designed it.
Also PCB is the same (90 x 30 totaly and 45 x 30 cm for the antenna)
Well, I did not read in the "Mini Whip dicussions on the web" about the fact
that I have to take care of the power supply.
Thats why I was supprised to see that much difference between all the power
suply's I did test this sunday afternoon.
I'll stay tuned. Don't go away befor I see something on 8970 Hz besides my own
test pc localy Hi Hi...
73's Peter - PA1SDB
(...and new bee, Perhaps you all did discover this all already in the past, but
I'm learnig day by day :-)
----- Original Message -----
From: "Roelof Bakker" <[email protected]>
To: <[email protected]>
Sent: Sunday, March 25, 2012 5:25 PM
Subject: Re: LF: Re: Power experiment / Mini Whip / 8970 Hz !
Hello Peter,
Some power supplies are particular noisy.
I use a wall wart type with a transformer (no switching type).
But again as you found out, noise differs from one model to the other.
It is a pity that wall warts with transformers are now banned in the EU.
It gets exceedingly difficult to source them.
Peter, which transistor are you using for the emitter follower?
73,
Roelof, pa0rdt
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