[time-nuts] What's best an HP 58503A, Z3805A, or Z3801A upgraded to 58503A?

2014-11-30 Thread Dr. David Kirkby (Kirkby Microwave Ltd)
I'm seriously giving consideration to getting an HP frequency standard, and are looking at some from the Chinese seller yixunhk on eBay. I would be interested in the views of people on the merits of these 5 quite similar items as a GPS locked frequency standard. I'm not really so bothered about

Re: [time-nuts] What's best an HP 58503A, Z3805A, or Z3801A upgraded to 58503A?

2014-11-30 Thread Bert Kehren via time-nuts
I would not buy any of them unless I want a HP case on the bench. They are all used! The present Lucent unit is HP and you get two for the price of $ 150 will do the best job for you. They are new and with all the activities presently going on at time nuts you may well end up with mods like

Re: [time-nuts] What's best an HP 58503A, Z3805A, or Z3801A upgraded to 58503A?

2014-11-30 Thread Rob040 .
Hi Bert, I could not find your earlier post about this, can you give an example? What I could find is your remark about forced cooling. How about that with the eighties HP case? Best regards, Rob. And as I mentioned before after taking off the front panel it fits nicely in an eighties

Re: [time-nuts] What's best an HP 58503A, Z3805A, or Z3801A upgraded to 58503A?

2014-11-30 Thread Bob Camp
Hi I have several of all of the below except for the “lab versions”. They are a mixed bag as you get them. Some are in very good shape. Others have obvious signs of water exposure. Some have minor to major physical damage. Some of them run for years. Some die in the first year. On Nov 30,

Re: [time-nuts] What's best an HP 58503A, Z3805A, or Z3801A upgraded to 58503A?

2014-11-30 Thread Bert Kehren via time-nuts
Rob attached is a picture of the case with the lucent in it. Just to make sure it fits. I use these cases extensively and have gotten some in the past for my Swiss friend. I have two tbolts in them and in one case have fan control. Use an analog temp. control with 12 V fan. Where and how

Re: [time-nuts] What's best an HP 58503A, Z3805A, or Z3801A upgraded to 58503A?

2014-11-30 Thread Dr. David Kirkby (Kirkby Microwave Ltd)
On 30 Nov 2014 16:17, Bob Camp kb...@n1k.org wrote: 1) Z3805A http://www.ebay.com/itm/251527236609 * 16 channels * double oven * dual outputs * $499 + free carriage 2) Z3805A http://www.ebay.com/itm/271324714268 * 8-Channels GPS Receive * 6-Channel GPS Parallel tracking *

Re: [time-nuts] What's best an HP 58503A, Z3805A, or Z3801A upgraded to 58503A?

2014-11-30 Thread Bob Camp
Hi On Nov 30, 2014, at 12:14 PM, Dr. David Kirkby (Kirkby Microwave Ltd) drkir...@kirkbymicrowave.co.uk wrote: On 30 Nov 2014 16:17, Bob Camp kb...@n1k.org wrote: 1) Z3805A http://www.ebay.com/itm/251527236609 * 16 channels * double oven * dual outputs * $499 + free carriage 2)

Re: [time-nuts] What's best an HP 58503A, Z3805A, or Z3801A upgraded to 58503A?

2014-11-30 Thread Magnus Danielson
Bob, As far as I can see, there are really only two basic sets of hardware here. 1) The earlier 10811 / Motorola design 2) The later 260 / Furuno design. Having dig deep into the Z3801 firmware, I can say that it has many features that doesn't even exist on the Z3801 hardware. Well, sort