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G4FVG > STORNO 19.10.06 15:07l 45 Lines 1892 Bytes #999 (0) @ WW
BID : B11343G4FVG
Read: GUEST
Subj: Help Stornophone 5000
Path: DB0FHN<DB0MRW<DB0PV<OE5XBL<OE6XPE<IW2OHX<XQ8FGC<HS1LMV<TU5EX<DB0RES<
ON0AR<LZ4NY<GB7PFD
Sent: 061019/1352Z @:GB7PFD.#48.GBR.EU #:41143 [Petersfield] FBB7.00i $:B11343G
From: G4FVG@GB7PFD.#48.GBR.EU
To : STORNO@WW
Hello and thanks for reading this plea.
I have been trying to restore two (from an original four) Stornophone 5000,
70 cms crystal transceivers with only partial success. They were obtained from
a junk box at a rally but did show signs of (once) working on a data mode
judging by a 9-pin D-plug being fitted on a flying lead that was soldered onto
various pins on the rear panel plugs.
They are both Storno type CQM 5664 with a multi (6) position channel selector
being fitted. Using the existing crystals and connecting 12v power, both sets
receive and transmit some RF on the correct frequency.
However, there is no audio nor data tones being transmitted on the carrier,
when either a microphone or a packet tnc output is connected to the mic hi
input.
I have managed to download a copy of the Stornophone 5000 maintenance manual
(section 5) of 32 pages that shows the audio input being connected between
pins 4 (hi) and 3 (lo/earth) of connector J911 (of 8 pins). (Channel selector
unit XS 5662 sheet 30)
Moving inwards, the circuit is traced to pin 1 of internal connector J902 that
is labelled 'Tx Audio Processor'. The processor output on pin 4 appears to
then proceed to modulate the crystal/carrier but have found nothing in either
radio or in the downloaded manual pages to process the audio between pins 1
and 4 :-(
Therefore, would welcome information if there are any other links to be made
(internally or externally) in order to get audio to modulate the carrier; or
any other solutions, thoughts or requirements.
Failing any information forthcoming, before I take these two radios to the
next rally junk box, could anyone use the tx/rx crystals that operate on 430,
432, 433 and 439 MHz to add extra channels to their own Storno transceiver??!
:-)
Thanks & 73 - Mike, G4FVG @ GB7PFD
Message timed: 12:47 on 19 Oct 06
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