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G8MNY > TECH 23.02.01 19:19l 22 Lines 884 Bytes #-9130 (0) @ WW
BID : 31654_GB7CIP
Read: GUEST OE7FMI
Subj: SYSTRON DONNER 1702 SIG Gen.
Path: DB0ZKA<DB0KFB<DB0CZ<DB0FRB<DB0PSC<DB0GH<DB0GE<LX0PAC<ON5VL<DB0QS<
ON6AR<ON0BWP<ON0OB<ON0CK<GB7SXE<GB7CIP
Sent: 010223/1708Z @:GB7CIP.#32.GBR.EU #:31654 [Caterham] #:293798 $:31654_GB7C
From: G8MNY@GB7CIP.#32.GBR.EU
To : TECH@WWW
Hi & thanks for reading.
I have bought one of these at the Leicester rally a few years ago. It is
19" rack sized & generates signal from 100Hz-999.9999MHz with 8 lever operated
thumb wheels. Made in the USA by the Throrn EMI owned Co. in 1983?
It uses many PLL oscillators & mixers all locked to an internal/external
reference. It has calibrated AM & FM modulation (digital readout) levels.
Unfortunatly it was not all working (eg no 144MHz) but I have now managed to
repair all the faulty bits I think, without a diagram! Which was very time
consuming, working out how it all worked.
I have done several mods now. eg FM deviation increased to 100KHz, & a "poor
mans Ceasium ref" (simular to BATC/Radcom) phase locked master crystal to BBC
terrestial TV.
I would appreciate any infomation on the unit.
73 de John, G8MNY @ GB7CIP
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