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KF4LLF > MFJ 24.07.12 02:53l 40 Lines 1319 Bytes #999 (0) @ WW
BID : 800009KF4LLF
Read: DL8BO DK3UZ GUEST DF6VB
Subj: MFJ1270C Problems. Anyone?
Path: DB0FHN<DB0FOR<DB0SIF<DB0EAM<DB0RES<PI8CDR<GB7YEW<N9PMO<AC4ZR<NN4NC<
W4BFB
Sent: 120724/0111Z 3795@W4BFB.W4BFB.#CLT.NC.USA.NA [Charlotte, NC] FBB7.00i
From: KF4LLF@W4BFB.W4BFB.#CLT.NC.USA.NA
To : MFJ@WW
Anyone willing to take a stab at why these 2 TNC's will not send out
packet tone audio but will key radio? Read on:
2 different - MFJ 1270C (Revision 11 boards) with Version 2.2 EPROMS
*Both TNC's will power on
*Will boot up and display cmd: prompt after MFJ Version info
*PC to TNC communication is fine
*TNC will key TX on radio
*AUDIO on TX is NOT packet bursts!
*The audio that is transmitted sounds more like a single high
pitched tone that is emitted non-stop until the TX is unkeyed.
*By all appearances, the TNC is working properly, but will not
supply correct audio output.
*TNC to PC baud rate has been tried at 1200 and 9600 (dip switches 2,
and 4)
*Dip switch 7 is "on" for 1200 baud radio tx
*Have tried "opposites positions" on dip switches (after reading that
one)
*Have tried multiple resets, and verified all jumpers are in
default positions on board
Still no luck. Single high pitched tone (almost squeal pitch) is emitted
during each transmit. Am I missing something here? There is no presence of
packet bursts, just the high pitched tone. Any ideas to share?
Thanks and 73's,
Seth
KF4LLF@W4BFB.#CLT.NC.USA.NA
73 - Seth, KF4LLF @ W4BFB-9
Message timed: 20:10 on 2012-Jul-23
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