[Premium-Rx] Racal 1792

[Richard Reich]

Chris,

RA1792 was a very good radio in its day - not so sure now - old sets can be a
bit noisey and insensitive.

Suffers from several problems...

Early models can have LCD displays which can go leaky or 'fuzzy' - caused/made
worse by extremes of temperature cycling (storing in a garage or loft).
Badly manufactured CPU boards bristling with dry joints (a soldering process
manufacturing problem) - can be fixed with patience. 
Similarly some of the CPU device PCB sockets are past their best now - a pain to
replace.

Beware of leaking memory back-up battery - if this has leaked onto the
surrounding board, it is impossible to completely stop the rot. Open the lid to
look by releasing 6 half-turn screws.

Audio quality from the inbuilt speaker is dismal - an external speaket is a
must.

CPU and interface chips (MK3850 and MK3853) have been obsolete since the early
80's - so replacements are hard (expensive) to find. Racal used graded (faster)
CPUs to make the 1792 work reliably - so not all replacements 3850s may work
satisfactorily.

If its cheap - buy it!

Richard
***************************************************************
Richard Reich    
Principal Engineer Hardware
SAAT Technology Ltd
Web: http://www.saatt.co.uk

DDI: +44(0)1420 545388
Fax: +44(0)1420 87259

Privileged, confidential and/or copyright information may be contained
in this e-mail. This e-mail is for the use only of the intended addressee.
If you are not the intended addressee, or the person responsible for
delivering it to the intended addressee, you may not copy, forward,
disclose or otherwise use it or any part of it in any way whatsoever.
To do so is prohibited and may be unlawful.

If you receive this e-mail by mistake please advise the sender
immediately by using the reply facility in your e-mail software.

This message is subject to and does not create or vary any contractual
relationship between SAAT Technology Limited and you.

Registered Office: Test House, Mill Lane, Alton, Hampshire, GU34 2QG
Registered in London. No. 4106589