[R-390] My Bobbsey Twins

[Don Reaves]

John,
Did you roll your own BG7TBL standard and distribution amp or find
something already packaged up?

Why do we list members have an interest in frequency standards, you might
ask?  Well, having a disciplined standard is not only essential to keep
test equipment locked in, digital modes on the ham radio shortwave and
longwave bands like WSPR and FT8 need accurate stable frequency references
to keep receivers and transmitters on the same time tics.

Don

PS, the HP-3478 is one of my favorites.

On Fri, Jul 5, 2019 at 9:41 AM <jgedde at optonline.net> wrote:

> Hiya Don,
>
> Just a quick run-down of my bench equipment as requested:
>
> Power Designs  TW500T Twin 0-50V Power Supply
> Bio-Rad 0-500V DC Power Supply
> Rigol DP832 Triple Power Supply
> Sorensen DCS33-33 0-33V/33A Power Supply
> Micronta Dual 15V power supply
> Keithley 2015-P Audio Analyzing DMM
> HP 3466A DMM
> HP 3478A DMM
> Brymen BM869S DMM
> Fluke 110 DMM
> Simpson 260
> Misc assorted low end DMMs
> NRI Model 70 Tube Tester
> Agilent 53131A Frequency Counter with 3.2 GHz option
> Rigol DG1022U Function/Arb Generator
> Rigol DS1102Z Scope
> Tek 2465 Scope
> Siglent SSA3021X Spectrum Analyzer
> HP 8644A Sig Gen
> BG7TBL 10 MHz GPS Disciplined Frequency Standard (GPSDO)
> BG7TBL 10 MHz Distribution Amplifier
>
> I am an electronics engineer by trade and do a lot of side-work in my home
> lab so many of these pieces are a business need.
>
> The 10 MHz standards are connected to my frequency counter, spectrum
> analyzer, RF sig gen, etc. and keep everything locked to a single, very
> accurate frequency standard (something like 40 parts per trillion)
>
> The microscope is an absolute necessity since my eyes are no longer
> anywhere
> near as good as they once were.  I need that for all but the largest SMT
> stuff.
>
> John
>
>
> -----Original Message-----
> From: r-390-bounces at mailman.qth.net <r-390-bounces at mailman.qth.net> On
> Behalf Of Don Reaves
> Sent: Friday, July 5, 2019 10:21 AM
> To: R-390 at mailman.qth.net
> Subject: Re: [R-390] My Bobbsey Twins
>
> Nice work, John.  You can be proud of either standalone or both side by
> side.
>
> I'm interested in the rundown on your workbench test equipment - looks like
> some high end modern goodies residing above your twins.   And an inspection
> scope to boot.   I do so appreciate the contrast, some might say irony, of
> a high end modern workbench used to service and restore classic radio
> receivers.  Its in the category of  "nothing is too good for our babies".
>
> In fact, I would find it interesting what modern test gear list members use
> and swear by, just for list members who are getting started putting
> together
> a service bench or or upgrading.  We are always upgrading, aren't we?  I'm
> in the process of restoring a Fluke 8842A DVM.  Not a modern meter by any
> means but better than most of the other older Flukes and HPs on my bench.
> And like my collection of R-390 gear, I need to downsize the older heavier
> larger test equipment on my sagging workbench.  Looking for a replacement
> for my HP-8640 sig gen.
>
> Don
>
>
>
> >
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-- 
Don Reaves  W5OR
8101 Barrett Rd.
Roland AR 72135
Fiber: 501.244.3574
Radio: 501.952.8573