Al, welcome to our group. Hope You will enjoy it. Good luck and see You on the air with Sierra soon. 73 - Petr, OK1RPok1rp
I had a similar but different problem with my Norcal 40A when first built. I heard an ugly electronic hum or buzz when I backed R8 away from fully clockwise.tmerchant1841
Not sure if anyone here can offer suggestions but here goes. I built & love a Norcal 40A. Need help troubleshooting 2 things on receive: when adjusting AF gainkc1bbc
The Sierra uses plug-in band modules available now for 160, 80, 40, 30, 20, 17, 15, 12 and 10 meters. (You can build modules for the other bands like 60m, 6m, 4m or even 136/500kHz by purchasing additional band module PC boards). Since there is no band switch, and because all controls and connectors are mounted on the main board, there's virtually no chassis wiring.
For the portable operators, the Sierra offers very low receive-mode current drain: only 35mA. The superhet receiver has excellent AGC range and sensitivity, RIT and a 400Hz crystal filter. Using ABX, you can vary the crystal filter's 6dB pass-band from about 150 to 1500Hz to adapt to operating conditions. Transmit power is about two watts. QSK is fast and clean.
In addition, there's built-in flexibility: extra panel and interior space that invites customization. You can even store up to four band modules inside the cabinet, internal battery pack, ATU etc. Quick-release latches on either side of the cabinet provide easy access to internal controls and for changing band modules.
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- May 13, 2007
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