Re: [TenTec] WTB: Ten Tec Filters 217 and 219

["Tommy" <aldermant@alltel.net>]

Tim,

Having tried what you want to try, if your a CW operator, let me 
suggest you follow a suggestion by Bill, W4ZV. Get the Inrad 600Hz 
roofing filter. As I don't operate SSB very often, I removed the 
2.4kc roofing filter, moved the 1.8kc filter into the 2.4kc slot, 
moved the 1kc filter into the 1.8kc slot, and installed the 600 Hz 
roofing filter in the 1kc position. Even though I disabled my 500 Hz 
TT filter, I kept the 250Hz filter enabled. The 600 Hz 4-pole 
roofing filter is just excellent for CW operation. With the 500Hz 
filter disabled, my 250 hz filter kicks in/out with a DSP setting of 
around 290 hz. That gives me a 600hz bandwidth roofing filter with 
DSP bandwidth from 290 hz all the way up to about 1010 hz DSP 
bandwidth. Really does work good.

The 'problem' with what TT tried to do for us who already had TT 6 
and 8-pole filters was because of the additional insertion loss of 
the 6 and 8-pole filters, they added a single stage amplifier in the 
250 and 500 hz roofing filter position. This amplifier causes pretty 
serious rcvr degradation when encountering strong signals close to 
your operating frequency. The Irad (or any 4-pole filter) really 
works very good in the 1kc roofing filter position.

73,

Tom - W4BQF

----- Original Message ----- 
From: "NZ8J" <nz8j@woh.rr.com>
To: <TenTec@contesting.com>
Sent: Saturday, December 04, 2004 10:10 PM
Subject: [TenTec] WTB: Ten Tec Filters 217 and 219


> Want to try them as roofing filters in my Orion
> If you have either or both for sale please send price shipped to 
> zip 45324
> Thanks
> Tim
> NZ8J
>
>
> _______________________________________________
> TenTec mailing list
> TenTec@contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec 

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