[Elecraft] [K3] Anyone Interested in A 750 Hz, 8-Pole (INRAD) Roofing Filter?

[Bob Naumann]

I would prefer to see some sort of add-on board that would allow for more
filters to be installed so I could have at least one more or perhaps 2 more
filters in my K3.

The 750 would be too wide for CW and would not replace the 500 in my radio.

I own the following;

200Hz, 500Hz, 1k, 2.1k, 2.7k, 6kHz.

They all work well and have their own purposes. I would love to toss out the
2.7 as it is too broad for SSB but for an unclear reason, we cannot use the
2.1 to transmit through.

So, one of my 6 filters cannot be used because there are only 5 slots. 

I want all 6. I would love to add a 12kHz for FM if there was space for it
too as a 7th filter.

W5OV

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Gary Hvizdak
Sent: Saturday, June 19, 2010 3:39 AM
To: elecraft at mailman.qth.net
Cc: support at unpcbs.com
Subject: [Elecraft] [K3] Anyone Interested in A 750 Hz, 8-Pole (INRAD)
Roofing Filter?

As I see it, some benefits of a 750 Hz width filter are that ...

o   It's about the optimal width if you are only getting one CW filter for
    general (i.e. non-contest) use.

o   For all but the most serious CW contesters, it would make a perfect
    one/two combination along with either the INRAD 400 or 250 Hz filter.

o   In most applications it can replace both the 1 kHz and the 500 Hz 8-pole
    filters, thus freeing an existing slot or saving on an initial purchase.

Please email webmaster at unpcbs.com to express your interest in purchasing a
750 Hz 8-pole INRAD roofing filter for your K3.  If there is sufficient
demand, then we will special order them in batches of ten, and offer them
at $125 plus our standard shipping and handling charges.  We do not intend
to stock these filters, although if demand turns out to be "astronomical"
then we would certainly reconsider.

TNX & 73,
Gary  KI4GGX  K3 #2724
webmaster, http://www.unpcbs.com/ 

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