[Amps] Building an Amp 101

[Carl]

Roller inductors usually start arcing in ham use where they are usually 
fixed tuned for long periods in other service.
The flat bar stock rollers with contacts on 2 sides are better than wire and 
round ones.

Carl
KM1H


----- Original Message ----- 
From: "Fuqua, Bill L" <wlfuqu00 at uky.edu>
To: "MU 4CX250B" <4cx250b at miamioh.edu>; "Al Kozakiewicz" 
<akozak at hourglass.com>
Cc: <amps at contesting.com>
Sent: Sunday, January 19, 2014 11:46 AM
Subject: Re: [Amps] Building an Amp 101


Instead of all those relays why not a roller inductor and motor.
But still complicated
73
Bill wa4lav
________________________________________
From: Amps [amps-bounces at contesting.com] on behalf of MU 4CX250B 
[4cx250b at miamioh.edu]
Sent: Sunday, January 19, 2014 9:32 AM
To: Al Kozakiewicz
Cc: amps at contesting.com
Subject: Re: [Amps] Building an Amp 101

Relays are certainly a possibility, Al, but for a nine band amplifier
things get a bit complicated. My latest project ( 90% completed) is a
duo – band 80m/160m amplifier with a pi– L tank circuit, and for that
I am using two DPDT vacuum relays, each of which cost over $100.
Scaling that up to a nine band amplifier doesn't seem very practical
or cost-effective.
73,
Jim w8zr
Sent from my iPhone

> On Jan 18, 2014, at 8:52 AM, Al Kozakiewicz <akozak at hourglass.com> wrote:
>
> Why not use relays appropriate for the switching duty?  Then the 
> bandswitch can be just about anything or even remotely controlled.  Plus 
> you can locate the switch where it's convenient to operate instead of 
> being constrained by the necessity to place it close to the RF components.
>
> Al
> AB2ZY
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