Ummmmm... I'm sure this response was well intended, so thank you for that and for the advice, but I do feel that Attila's earlier reply explained my reasoning remarkably well. Under consideration is the taking of a very nice example of an older and now unusable off air frequency reference, a little bit of interesting history perhaps, and putting it back on the air without any form of internal modification. So what's the point? Well that's it, other than the satisfaction of doing it there really is no point, other than perhaps, to quote one of my wife's favourite sayings, "just because":-) Time code receivers are not really my thing, each to their own I guess, but a no doubt somewhat unhealthy obsession with reasonably precise frequency generation does mean that finding a more modern frequency source to drive it may not be too much of a problem:-) Nigel, GM8PZR On 06/18/2017 04:17 PM, GandalfG8--- via time-nuts wrote:> I have a 5090B which I'm hoping to get up and running when it finally > reaches the top of the to do list and my view is that it would be much better to > leave the original electronics undisturbed and to drive it with a 200 KHz > signal divided down from a from a GPSDO or a rubidium module, although > having one of the latter already running at 800KHz does leave me a bit > biased:-) What in the world would the point of that be!? It appears to be a long-obsolete product, so have you searched for more modern time code receivers from timing instrumentation (Meinberg, Brandywine, et al.) and surplus vendors? It'll probably be pretty expensive, for it's probably much less popular than WWVB and DCF77. Have you tried the latter? It might be receivable from Britain, and I've seen some surplus DCF77 receivers (e.g., an old ISA card). -Ruslan