[1000mp] Filters: Inrad 400 or Collins 500 ??

[1000mp@mailman.qth.net]

Hello Chuck,

First of all I wish you a lot of pleasure with your MK V Field!

Always an interesting question about the filterchoice. Not only interesting,
but very important too because it has to do with selectivity and with the
audio quality. And a few more.

My opinion is that the Yaesu 500 Hz Collins filter is a good choice for the
second receiver. The somewhat wider skirts may be an advantage for the use
of the sub receiver.

For the main receiver my choice would be:
Inrad
2800
2100
1000
400

For more selectivity I use the EDSP 240, 120 and 60!

These steps are more logical to me then 2800 - 2100 - 400 - 250. There is a
big gap between 2100 and 400 and it is a small step between 400 and 250.

Now about the 70 MHz IF modification.

I used the IF modification for about 9 months in the Mark V, which I have
for 16 months now.
Despite the usage of the IPO, some attenuation and selection '7' in the menu
9-1, I noticed some distortion with really strong signals. This is the
reason why I de-installed the mod again. Nevertheless I advise you to try
the IF mod for yourself! Just try it for a couple of months and make your
own opinion. In my point of view it is always worth while trying. I cannot
give exact figures on your Mk V Field, which is definitely different from my
Mk V.

Good luck, all the best and 73!
Hans Remeeus.

Ham Radio:
PA1HR

Sites:
www.remeeus.nl
www.qsl.net/pa1hr

e-mail:
hans@remeeus.nl


----- Original Message -----
From: <kr6c@juno.com>
To: <1000mp@mailman.qth.net>
Sent: Wednesday, November 06, 2002 5:01 AM
Subject: [1000mp] Filters: Inrad 400 or Collins 500 ??


> Im looking at purchasing some filters for a Mk-V Field.
> For Narrow2 setting, Im looking at the pair of Inrad 250's (160 weak
> signal)
> For Narrow1, Im debating on installing a filter in the 3rd IF  (General
> CW and some weak signal)
> Since the radio comes with a 500Hz in the 2nd IF, does adding the 3rd IF
> filter really gain much?
> If so, which one? the Inrad 400 or the Collins 500?
> I understand the Collins has a little wider skirts but which way do I
> need to go?
> I dont know if the 400 will be too tight since im going to have the 250's
> anyway.
> Would the Collins widen things out so the Normal, Narrow1 and Narrow2 are
> somewhat "linear" as I step down?
> Saving a couple of $$$ sure helps since these things are expensive but at
> what performance cost?
> Also, should I install the 70 IF Mod?  Is it worth it?
>
> I figure since the radio comes with a pair of 2.8 for SSB, this should be
> OK for SSB.
>
> Tnx
> Chuck KR6C
>
> ________________________________________________________________
> Sign Up for Juno Platinum Internet Access Today
> Only $9.95 per month!
> Visit www.juno.com
> _______________________________________________
> List Moderator: Richard Lubash N1VXW
> 1000mp mailing list
> 1000mp@mailman.qth.net
> To Change Options or Unsubscribe:
> http://mailman.qth.net/mailman/listinfo/1000mp
>