[ARC5] Selectivity improvement in ARC-5 receivers - anotherquestion.

[Roy Morgan]

On Jun 3, 2014, at 1:07 AM, Brian Clarke <brianclarke01 at optusnet.com.au> wrote:

> Hello Ken,
> 
> Dr Drake was at least a genius when it came to design.

The R. L. Drake Company began by building filters, I learned from their website.*

I have a NIB RF F-15/U filter.
- about 76 mc cutoff frequency
- built like the tanks it was meant to be used against
- added to a tank jamming system, the purpose of which was to disrupt German tank communication
- has very robust coils and mica-sheet inter-section capacitors
- further info at: http://www.drakemuseum.com/f15u.htm

*  http://www.rldrake.com/about-history.php
"R.L. Drake was founded in 1943 by Robert L. Drake, a young engineer with a significant background in radio design for major industry concerns. The company began as a manufacturer of low pass and high pass filters for the government and amateur radio market. After World War II, the company applied its engineering expertise to the consumer market and started producing amateur or "ham" radio transmitters and receivers.
…”

Roy

Roy Morgan
RoyMorgan at alum.mit.edu
K1LKY Since 1958