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pitched beeps (one beep happens normally), three or more logo screen
changes, and power-on times in the 30 to 50 second range. A replacement
battery may be obtained from Elecraft. If the replacement runs down
quickly as well, a repair to the SBC module may be required.
NOTE: TO AVOID DAMAGE TO THE MAIN PROCESSING MODULE,
FOLLOW INSTRUCTIONS SUPPLIED WITH THE BATTERY.
RECEIVE
No received signal: Check for (1) receiver being squelched; (2) RF GAIN too
low (set RF gain controls fully clockwise, to 0 dB); (3) bandwidth too narrow
(set {FILTER} <BW>); (4) selected receive antenna not connected; (5)
selected ATU antenna not connected.
Audible artifacts heard in receive audio on key-up when using external
amplifier: Slow external amplifier T/R switching can cause receive artifacts
on key-up (return to receive), especially if there are very strong signals near
your operating frequency. To eliminate these, use MENU:TX DLY, Unkey to
Receive. Slow amp T/R switching can also cause transmitted artifacts; see
MENU:TX DLY, KEY OUT to RF.
Received signal level too low at speakers or headphones: (1) check
headphone and speaker plugs and cables; (2) make sure that <MAIN RX>
<RX EQ> settings are either flat or have not been set for a large amount of
cut; (3) make sure RF GAIN is set to maximum (0 dB, or no attenuation); (4)
check preamp and attenuator settings; (5) turn off noise reduction (NR); (6)
check receive antenna; (7) tap ATU TUNE to ensure optimal antenna match.
Received signal level too low via USB LINE OUT on Windows PC: Windows
Sound Control Panel does not accurately show sound input level. The
correct levels are shown by WSJT, MMTTY, and other apps.
Front headphones not recognized: Allow up to 3 seconds for front
headphone plug insertion or removal to be recognized. (Rear headphones
are detected by a different method with no delay.)
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