[time-nuts] Speaking of 5370s

2013-09-01 Thread Mark Sims
The slide switches on the 5370's use gold plated springs that slide on a PC board. They are located such that the fan fills them with dust and dirt. Failures are very common, but easy to fix. You need to disassemble the switch board and clean everything.

Re: [time-nuts] Speaking of 5370s

2013-09-01 Thread Christopher Brown
If they were it would be a non issue, know how to do the basic fixes for those and have multiple donors. The bad switches on my 5370B are the slide switches on the right, start sep/com, atten, etc. This unit went through a warehouse style surplus dealer and took impact damage, nothing major to th

Re: [time-nuts] Speaking of 5370s

2013-08-31 Thread Pete Lancashire
If the switches your talking about are the push buttons or Bill West switches http://www.rbarrios.com/projects/HPSWITCH/ if now .. sorry -pete On Fri, Aug 30, 2013 at 2:32 AM, Christopher Brown wrote: > > Working on reviving a 5370B, have everything working except the > switches. (multiple

[time-nuts] Speaking of 5370s

2013-08-31 Thread Perry Sandeen
List, I have four 5370b units.  Two of the three lost the frequency input channel while I was using it for long term frequency monitoring.  The fourth unit I bought for “parts or not working” had the same frequency input problem.   Do we see a trend here?   Verifying that the input switch(s) are

Re: [time-nuts] Speaking of 5370s

2013-08-31 Thread Christopher Brown
I have 4 5335s, one very nice unit repaired by KN5U, two I repaired myself and one I am still working one. (2 std, 2 option 40) The 5334 and 5335 to not use the same style switches as the 5370. HP liked to re-use parts, except where they did not. This gear comes from a time when alot more parts

Re: [time-nuts] Speaking of 5370s

2013-08-30 Thread Brian Alsop
This brings to mind the early 60's. You could go to Arrow Electronics on Long Island. The had trays of a large variety of ceramic switch wafers, switch bodies, shafts, bolts, nuts etc. You simply selected what your needed to build you MxNxP rotary switch.. Yearning for the past. Brian On

Re: [time-nuts] Speaking of 5370s

2013-08-30 Thread Don Latham
I haven't looked on mine, but can you drill a 1/4 in hole and patch in little pb switches? or patch in the common small 4-pin pcb switches? looks ugly, of course, but... Don Bob Camp > Hi > > Don't know if the switches are compatible, but the 5334 and 5335 are a > lot more common than the 5345 and

Re: [time-nuts] Speaking of 5370s

2013-08-30 Thread Bob Camp
Hi Don't know if the switches are compatible, but the 5334 and 5335 are a lot more common than the 5345 and 5370. For that matter I'd bet there are a bunch of same era DVM's and such that have switches that might work. Bob On Aug 30, 2013, at 2:32 AM, Christopher Brown wrote: > > Working on

[time-nuts] Speaking of 5370s

2013-08-29 Thread Christopher Brown
Working on reviving a 5370B, have everything working except the switches. (multiple switches took impact damage). So, if anyone has 5370 or 5345 front switch/control board(s) they want to part with, let me know. ___ time-nuts mailing list -- time-nuts