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 Post subject: Panasonic R-1027
PostPosted: Sep Sun 13, 2020 9:19 pm 
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Joined: Oct Mon 02, 2017 8:53 am
Posts: 775
Location: Panama City, FL 32401
Both these Panasonic's arrived this weekend. I recapped them both. The black one has smooth tuning, making it easier to tune slowly. I peaked the I.F.'s and antenna trimmer, and am really impressed with its sensitivity. Literally every 10 KHZ I can get a station,even down to 530 KHZ,with no loss in sensitivity. The audio is good clear and loud. Did have a problem with the white one. While working on it the negative wire came off the tab underneath the spring. Tried to solder it back on and no luck. Think I need a higher wattage iron for that. Maybe I can beg/borrow one. It does work, but the tuning is hard, lots of tension on it. These radios are sensitive to hand capacitance, causing less sensitivity while holding the upper half of the radio, and top. Even tuning from the side adds a little decrease in sensitivity, so it's good to remember that. The black one is using 14.5 ma current. The white one measured 10.8 ma, quite better. There are no screws to remove, the chassis simply snaps/unsnaps into place. They're a great choice if you're looking for a cheap (price wise) radio with better than average sensitivity. Other Panasonics that are similar:
R-1029
R-1028
R-1019
R-1018
R-1013
All these are 3 volt radios with similar chassis.
The electrolytics are:
220uf
10uf
1uf


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 Post subject: Re: Panasonic R-1027
PostPosted: Sep Sun 13, 2020 10:14 pm 
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Joined: Oct Mon 26, 2009 10:02 pm
Posts: 6580
Location: Indianapolis, IN
I got one of those in a "package deal" and it was full of alkaline battery leakage and corrosion. Pulled chassis and thoroughly cleaned all including PCB with dishwashing liquid solution and water until all loose residue was gone then blew out with compressed air nozzle. It has been a great source for transistors and other parts. Amazingly, even an IFT used for another radio was still good after all of this ! The alkali had stripped all wax from ferrite-rod antenna and anything else it could attack.

Too bad considering it sounds like it would have been a good radio, but it wasn't wasted and enabled several other radios to be successfully repaired !

John


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 Post subject: Re: Panasonic R-1027
PostPosted: Sep Sun 13, 2020 10:53 pm 
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Joined: Oct Mon 02, 2017 8:53 am
Posts: 775
Location: Panama City, FL 32401
Hi John. Tweaking the top yellow I.F. made the most difference. It was off by a 1/4 turn. The other IF's were a little off. The sensitivity really improved by doing that plus the antenna trimmer. It's funny how some radios are fun to work on and everything works as intended, but others are a complete nightmare. I bought a Panasonic R-1018 that's part of a package of 3 radios, but the price was like buying 1, so that should be here tomorrow.


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