[Lowfer] New bench testing of PA output filter

[John Andrews]

Retune the antenna?

JA

----- Original Message -----
From: "Bill Ashlock" <ashlockw@hotmail.com>
To: <lowfer@mailman.qth.net>
Sent: Tuesday, September 03, 2002 11:29
Subject: [Lowfer] New bench testing of PA output filter


> Mike and all TX loop enthusiasts,
>
> You may be interested in knowing that when I insert the 63uh-1.8n-63uh
> filter (IE: the Lyle filter) between my final and the loop stepdown
> transformer I loose at least 25% of the loop current for a constant 1W of
> input power. I have tried different types of cores and inductance/capacity
> ratios but the results are similar. Without the filter the total
efficiency
> is about 95% and those little MPS6602/52s run as cool as cucumbers. I
can't
> seem to make the Psice model agree with these results, however.
>
> Bill
>
> _________________________________________________________________
> Send and receive Hotmail on your mobile device: http://mobile.msn.com
>
> _______________________________________________
> From the Lowfer mailing list
> Send messages to: Lowfer@mailman.qth.net
> To sub/unsub visit: http://mailman.qth.net/mailman/listinfo/lowfer