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 Post subject: Zenith Royal 300
PostPosted: Feb Sat 22, 2020 4:47 am 
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Joined: Oct Mon 02, 2017 8:53 am
Posts: 408
Location: Panama City, FL 32401
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I recapped this today, then tweaked the IF's and trimmers. Couldn't get the dial real accurate, but it hears very well and sounds great with strong audio. Also came with the leather case in nice shape. These really have good tone quality. At first the volume pot and tuning had lots of noise. Just from using it today most if not all that is gone.


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 Post subject: Re: Zenith Royal 300
PostPosted: Feb Sat 22, 2020 5:14 am 
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Joined: Oct Mon 26, 2009 10:02 pm
Posts: 6361
Location: Indianapolis, IN
Thanks for the close-up pics---looks like it'll clean up and be a beauty !

That's a Zenith model I don't have and am curious about its performance & sound quality---how does it compare to the "pre-"D"" Royal 500 ?

John


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 Post subject: Re: Zenith Royal 300
PostPosted: Feb Sat 22, 2020 6:16 am 
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Joined: Oct Mon 02, 2017 8:53 am
Posts: 408
Location: Panama City, FL 32401
Thanks John. Supposedly this is similar to the 500B. I don't know if it's exactly the same,but Zenith used many similar chassis with different looking radios. The Royal 280,285,and 500E-1 are the same chassis, right down to the electrolytics being in the same location. This 300 doesn't have vernier tuning, which the 500B does have. I'm listening to this right now, it's doing fine on WSM. One interesting note: on another early version I have the tuner shows 1400 at the upper end instead of 1600,which this has. I'm curious if the other radio is an earlier version than this. Unfortunately the serial numbers don't run consecutively like they did on the early 500.


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 Post subject: Re: Zenith Royal 300
PostPosted: Feb Sat 22, 2020 6:42 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 34506
Location: SoCal, 91387
Thx for posting; that's not a common model, although the chassis looks very similar to the Royal 500 series.

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 Post subject: Re: Zenith Royal 300
PostPosted: Mar Sun 01, 2020 11:03 pm 
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Joined: Oct Thu 18, 2007 11:34 am
Posts: 4279
Location: Port Orchard, Wa 98366
Attention I am going to:
Edit
Poke fun : "but it hears very well" :lol:
Never knew a radio could do that!
More like Maybe "Receives well"?
Or it's very comfortable for Me to listen to. 8)

Excellent Photos very Clear and Sharp. I will add these to my photo collection. Thanks!

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Last edited by Radiosmoker on Mar Mon 02, 2020 7:50 pm, edited 1 time in total.

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 Post subject: Re: Zenith Royal 300
PostPosted: Mar Sun 01, 2020 11:53 pm 
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Joined: Feb Fri 13, 2009 5:09 am
Posts: 612
Location: Santa Clara, CA
Well, it's common to describe a radio that is not sensitive, or even has bands that are totally dead as "deaf" in certain areas of intended reception, so I think I was able to infer the correct meaning from the OP's terminology... Colorful and unusual, but not an opaque description.


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 Post subject: Re: Zenith Royal 300
PostPosted: Mar Mon 02, 2020 2:14 am 
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Joined: Oct Mon 02, 2017 8:53 am
Posts: 408
Location: Panama City, FL 32401
Well,my apologizes...I should have said,"It has ample amounts of RF and AF gain."

:roll:


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 Post subject: Re: Zenith Royal 300
PostPosted: Mar Mon 02, 2020 6:14 am 
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Joined: Dec Sun 16, 2007 4:59 am
Posts: 635
Location: Minnetonka, MN 55305
Zenith made hearing aids. This radio "hearing well" is, well, perfect.

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 Post subject: Re: Zenith Royal 300
PostPosted: Mar Mon 02, 2020 7:05 am 
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Location: SoCal, 91387
Zenith Royal wrote:
Well,my apologizes...I should have said,"It has ample amounts of RF and AF gain."

:roll:

I don't think you have to apologize about a damn thing. Your post was perfectly clear.

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 Post subject: Re: Zenith Royal 300
PostPosted: Mar Mon 02, 2020 7:48 pm 
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Location: Port Orchard, Wa 98366
Hey I was Just Poken Fun, That's all.

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 Post subject: Re: Zenith Royal 300
PostPosted: Mar Tue 03, 2020 2:49 am 
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Joined: Nov Wed 14, 2007 11:37 pm
Posts: 1625
Quote:
Supposedly this is similar to the 500B. I don't know if it's exactly the same,but Zenith used many similar chassis with different looking radios.



I just won a 300 on ebay. It has not arrived yet, but in looking up the SAMS it is listed under two different printings, 433-19 , dated 5/59 and 412-16 from 9/58. Evidently two different chassis were used, 7AT42Z1 and 7AT42. I havent studied the schematics to see what the differences are, but it's something to be aware of.


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 Post subject: Re: Zenith Royal 300
PostPosted: Mar Tue 03, 2020 5:05 am 
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Joined: Oct Mon 02, 2017 8:53 am
Posts: 408
Location: Panama City, FL 32401
metzman wrote:
Quote:
Supposedly this is similar to the 500B. I don't know if it's exactly the same,but Zenith used many similar chassis with different looking radios.



I just won a 300 on ebay. It has not arrived yet, but in looking up the SAMS it is listed under two different printings, 433-19 , dated 5/59 and 412-16 from 9/58. Evidently two different chassis were used, 7AT42Z1 and 7AT42. I havent studied the schematics to see what the differences are, but it's something to be aware of.


I have the schematics for both. The main difference other than the different transistors is the capacitor used for the agc. In the 7AT42Z1 they used a 3uf. In the 7AT42 it's a 16uf.
The other capacitors are: 2-50uf
1-3uf
This also agrees with the 300's I have.
Good luck with yours. I love mine.


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 Post subject: Re: Zenith Royal 300
PostPosted: Mar Sat 07, 2020 1:30 am 
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Joined: Nov Wed 14, 2007 11:37 pm
Posts: 1625
Quote:
I have the schematics for both. The main difference other than the different transistors is the capacitor used for the agc. In the 7AT42Z1 they used a 3uf. In the 7AT42 it's a 16uf.
The other capacitors are: 2-50uf
1-3uf


Here's the 300 that came in today. Z1 version. Battery terminals have significant corrosion,but can be restored. Oscillator transistor is different. Looking forward to a full restoration when time allows. No vernier tuning but I like the feel of the large tuning knob. Another high quality coat pocket from Zenith!


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 Post subject: Re: Zenith Royal 300
PostPosted: Mar Sat 07, 2020 4:37 am 
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Location: Panama City, FL 32401
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metzman wrote:
Quote:
I have the schematics for both. The main difference other than the different transistors is the capacitor used for the agc. In the 7AT42Z1 they used a 3uf. In the 7AT42 it's a 16uf.
The other capacitors are: 2-50uf
1-3uf


Here's the 300 that came in today. Z1 version. Battery terminals have significant corrosion,but can be restored. Oscillator transistor is different. Looking forward to a full restoration when time allows. No vernier tuning but I like the feel of the large tuning knob. Another high quality coat pocket from Zenith!


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Very nice! The black one in the picture is an early version, as indicated by the "Seven transistors." The dial also goes up to 1400,though it will tune higher. The green and black were the most popular colors, with red being somewhat rarer. The white is extremely rare. I've only seen about 4-5 ever for sale,and that probably includes mine! It's even rarer to find one in good condition. Zenith didn't make many for some reason. I agree the tuning is quite smooth for not being vernier.


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