Posted By zenlogic on April 14, 2010

Alrighty then, I have been seeing a few hits from Google of people searching  zenith radio schematics, I do have the schematics for the H503, get them here:

Zenith H503 Schematics

Note, I can not retrace my route to where I got them from, sorry who ever you are – However I don’t think you would be to upset if I post them here – on the other had If I am mistaken, let me know and I will figure something else out. Thank you.

Other news: Yep, as I suspected,  my  dad still has the radio and he said it was mine if wanted it! Woot!

I will post about it when I get my hands on it and the restore process – I saw somewhere on the interwebs a place that can make a replacement battery for it and another place for the tubes – Nice, I will keep you guys informed.

And still other news, I still haven’t got a Transceiver yet, so many choices – not enough info kind of thing, still looking and figuring. Any suggestions for a brand new Ham? Okay, Later – Zenlogic

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Posted By zenlogic on March 21, 2010

My dad called yesterday and we talked about the old radio. He reminded me it was a Zenith and it was not his dad’s,  but was given to him by his dad when he was about 16. It was a nice Zenith H503 with battery as they had no electricity then.

I found some pics on the web of a similar one:

So there ya go. Now he also wondered about my statement on adjusting the coil, so after the call I thunk way back to that time and tried to remember how I did it, I vaguely remembered sometimes  messing with the antenna, moving the core in the antenna coil and sometimes  taking a small screwdriver and turning a screw on top of the tuning coil ( this was sometimes painful), which made it go out of band.  While I was looking for pictures, I ran across the schematics for the radio and a picture of the insides. Yep, just as soon as I saw the insides, it all came back ( remember, this was at least 30 years ago.), there was the screw I turned  and the other two I would play with. Turns out they are  the oscillator trimmer, the detector trimmer and antenna trimmer.  That’s how I made it go out of band, weird but it worked.

Now as to when I used radio, my dad worked 8 to 16 hours a day for all of my young life, my mom wasn’t much of a kid watcher, she mostly just kicked us out in morning and made sure we had three meals a day and were in by 8 o’clock everyday, there wasn’t much of anything around the house that I wasn’t able to get to and play around with, while dad was away to work. So dad, if you are wondering, that is when I got to your stuff, that’s how I got to most everything and I got real good at putting back stuff exactly where it was. Except………….well we won’t discuss that here ( but it involves a glove compartment). I am not being a butt here, I was always curious as to how stuff worked and you had all the cool stuff, what was I to do? By the way, I am sorry…………

So, after that conversation I decided to update with this post and I will correct the post below, have a great day!

later, zenlogic.

P.S. Zombies is just a metaphor for any kind of godlike shit hitting the fan or a huge society changing disaster.

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