[hpsdr] Alex Filters & Switching Board

[Tim ORourke]

Unless you are in RF rich environment as in Europe or multi-opp contest station environment you probably would not benefit from BPF's in Alex. 
Hercules has Tx LPF so Alex is not needed for Tx.
All you need is TX/RX switch arrangement, Gerd's or homebrew.
One thing you do NOT want to do is use Alex TX filters with Hercules and feed Fwr/Rev signals back to Penny from Hercules with Fwr/Rev cable in place from Penelope to Mercury/Alex. Signals from db25 on Penny and Alex will collide in Mercury. Use power bridge in Hercules OR Alex not both. Nor do you want to leave the Fwr/Rev cable in place from Mercury to Penelope when feeding signals into Penelope from external source. Schematics for Penelope and Mercury will make this clear.
Tim W4YN


-----Original Message-----
>From: Bruce Mills - KL7JDR <kl7jdr at alaska.net>
>Sent: Jan 7, 2014 12:31 PM
>To: hpsdr at lists.openhpsdr.org
>Cc: kl7jdr at alaska.net
>Subject: [hpsdr] Alex Filters & Switching Board
>
>***** High Performance Software Defined Radio Discussion List *****
>
>
>Building a complete HPSDR transceiver with the Mercury receiver & Pennylane exciter.
>
>Will have the Hercules 100 watt Amplifier installed.
>
>Does it help or hurt to have the Alex Filters & Antenna switching boards installed ?
>
>Or should I use the DJ8AY Antenna Switch ?
>
>73's ,
>
>Bruce - KL7JDR
>
>Bruce W. Mills
>P.O. Box 1500
>31490 Echo Lake Road
>Soldotna , Alaska
>   99669
>
>(907)262-4373 Home
>(907)398-4595 Cell
>
>kl7jdr at alaska.net
>
>
>
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Tim O'Rourke 
W4YN at ARRL.Net
Low Power Amateur Radio Rocks 
Member of Flying Pigs,ARCI,GQRP,RSGB,ARRL Life Member
NHRA Life Member

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