Poor poor little National HRO Senior L76

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Poor poor little National HRO Senior L76

Radioroslyn
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Posts: 7,303
Threads: 269
Joined: Dec 2009
City: Roslyn Pa

#70

01-31-2017, 03:20 AM

I finally got the digital readout to work properly on this beast. I started out using rectified heater voltage to power it but it didn't like it much at all. Worked much better w/a 9v battery.Ended up building a 12vdc p/s inside the rack p/s to power it. As Mondial said it is pretty sensitive so I had to attenuator the oscillator signal. Wasn't quite sure what is grounded on the counter but signal - power - and the mounting hardware had no interconnection. Grounding the power - to the chassis helped a lot and bypassing the 12vdc w/a .1 cap got it to settle down nicely. Works great now from 500kc-30mc. Haven't tried any of the low frequency coils yet.
I'm pleasantly surprised at how stable this old guy is after in little warm up time and the counter proves it.

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When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!

Terry

(This post was last modified: 01-31-2017, 03:27 AM by Radioroslyn.)

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Poor poor little National HRO Senior L76 - by Radioroslyn - 04-13-2015, 09:08 PM

RE: Poor poor little National HRO Senior L76 - by morzh - 04-13-2015, 09:13 PM

RE: Poor poor little National HRO Senior L76 - by sam - 04-13-2015, 09:47 PM

RE: Poor poor little National HRO Senior L76 - by OldRestorer - 04-13-2015, 09:47 PM

RE: Poor poor little National HRO Senior L76 - by Arran - 04-13-2015, 09:49 PM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 04-13-2015, 10:25 PM

RE: Poor poor little National HRO Senior L76 - by Arran - 04-15-2015, 12:21 AM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 04-14-2015, 09:03 PM

RE: Poor poor little National HRO Senior L76 - by Eliot Ness - 04-15-2015, 12:39 AM

RE: Poor poor little National HRO Senior L76 - by sam - 04-14-2015, 11:31 PM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 04-15-2015, 07:57 AM

RE: Poor poor little National HRO Senior L76 - by Eliot Ness - 04-15-2015, 08:46 AM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 04-15-2015, 07:44 PM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 04-26-2015, 09:00 AM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 04-26-2015, 06:42 PM

RE: Poor poor little National HRO Senior L76 - by klondike98 - 04-26-2015, 07:26 PM

RE: Poor poor little National HRO Senior L76 - by Sean - 04-27-2015, 09:07 AM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 04-27-2015, 10:04 AM

RE: Poor poor little National HRO Senior L76 - by Sean - 04-27-2015, 05:30 PM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 04-29-2015, 10:04 PM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 04-29-2015, 10:07 PM

RE: Poor poor little National HRO Senior L76 - by Eliot Ness - 04-30-2015, 06:56 AM

RE: Poor poor little National HRO Senior L76 - by sam - 04-30-2015, 11:26 AM

RE: Poor poor little National HRO Senior L76 - by klondike98 - 04-30-2015, 04:00 PM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 04-30-2015, 06:55 PM

RE: Poor poor little National HRO Senior L76 - by Sean - 05-01-2015, 11:39 AM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 05-01-2015, 08:30 PM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 05-19-2015, 09:39 PM

RE: Poor poor little National HRO Senior L76 - by sam - 05-19-2015, 10:35 PM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 05-20-2015, 07:58 AM

RE: Poor poor little National HRO Senior L76 - by sam - 05-20-2015, 11:56 AM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 05-25-2015, 07:58 AM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 05-26-2015, 10:25 PM

RE: Poor poor little National HRO Senior L76 - by sam - 05-26-2015, 10:38 PM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 05-27-2015, 06:17 AM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 05-27-2015, 06:28 AM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 05-31-2015, 07:21 AM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 06-01-2015, 08:44 AM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 06-01-2015, 08:33 PM

OT RCA 6T71 1950 TV - by Radioroslyn - 06-13-2015, 10:19 PM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 06-18-2015, 09:13 PM

RE: Poor poor little National HRO Senior L76 - by sam - 06-19-2015, 04:27 AM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 06-19-2015, 10:11 PM

RE: Poor poor little National HRO Senior L76 - by Sean - 07-03-2015, 10:50 PM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 07-03-2015, 11:41 PM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 07-10-2015, 11:47 PM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 07-19-2015, 06:26 PM

RE: Poor poor little National HRO Senior L76 - by sam - 07-19-2015, 07:40 PM

RE: Poor poor little National HRO Senior L76 - by Paul Philco322 - 07-20-2015, 09:45 PM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 07-26-2015, 12:44 PM

RE: Poor poor little National HRO Senior L76 - by Sean - 07-26-2015, 06:22 PM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 07-27-2015, 05:05 PM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 07-31-2015, 06:38 PM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 08-03-2015, 12:42 AM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 08-19-2015, 07:17 AM

RE: Poor poor little National HRO Senior L76 - by Mondial - 08-20-2015, 12:14 AM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 08-20-2015, 07:49 AM

RE: Poor poor little National HRO Senior L76 - by Mondial - 08-20-2015, 12:34 PM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 08-20-2015, 06:53 PM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 08-20-2015, 10:34 PM

RE: Poor poor little National HRO Senior L76 - by sam - 08-20-2015, 10:37 PM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 08-23-2015, 01:02 PM

RE: Poor poor little National HRO Senior L76 - by sam - 08-23-2015, 01:42 PM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 08-23-2015, 01:57 PM

RE: Poor poor little National HRO Senior L76 - by sam - 08-23-2015, 02:45 PM

RE: Poor poor little National HRO Senior L76 - by vecher - 08-23-2015, 06:31 PM

RE: Poor poor little National HRO Senior L76 - by Sean - 08-24-2015, 09:36 AM

RE: Poor poor little National HRO Senior L76 - by targeteye - 06-11-2016, 12:45 PM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 06-11-2016, 07:20 PM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 01-31-2017, 03:20 AM

RE: Poor poor little National HRO Senior L76 - by OldRestorer - 01-31-2017, 09:36 AM

RE: Poor poor little National HRO Senior L76 - by morzh - 01-31-2017, 10:19 AM

RE: Poor poor little National HRO Senior L76 - by Mondial - 01-31-2017, 12:18 PM

RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 01-31-2017, 01:02 PM

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