Re: [TowerTalk] Bandpass filters - ICE vs Dunestar

[Jim Lux <jimlux@earthlink.net>]

At 03:42 PM 1/31/2005, David Hachadorian wrote:

> In the ICE design, the signal path goes through 12 sets of relay contacts, 
> 10 of which are normally closed. W7WW has complained about intermittent 
> signal dropouts on receive, where he either has to physically smack the 
> box, or transmit one DIT to break through what is apparently an insulating 
> film on one of the normally closed relay contacts.

DO you mean that there are essentially 6 filters in series which are either 
in the circuit, or there's a shunt around it?

As opposed to having a (effective) 1P6T switch on each side of a bank of 
parallel filters? (The latter is what is typical in transceiver LPF sections)


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