Couple of questions...
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Couple of questions...
This doesn't relate to my previous post, so I started a new one. Firstly, I've been going to the schematics quite a bit for the Moto 6y radio, and I'm a little confused. There are many resistors on it that for instance say "470MOhm". I would [i]assume that means "megohms", but the resistor color codes and ohm meter read out to be Kilohms. What terminology are they using to come up with that? Reason I ask is that this radio is a family heirloom and I dont want to mess it up and the previous repair person was not interested in making anything easy for me.
Secondly: I don't have a tube tester, nor can I afford one right now. I don't even get enough radios to justify the purpose of buying one. Furthermore, some of these tubes cost 20-30 bucks apiece, so I don't want to randomly buy new ones if I don't need to. Is there anybody out there that would test them for me if I mail them to you? There are 6 tubes and they are all octal base. Two have a top terminal. I'll be happy to pay you for your trouble.
Thanks in advance.
Secondly: I don't have a tube tester, nor can I afford one right now. I don't even get enough radios to justify the purpose of buying one. Furthermore, some of these tubes cost 20-30 bucks apiece, so I don't want to randomly buy new ones if I don't need to. Is there anybody out there that would test them for me if I mail them to you? There are 6 tubes and they are all octal base. Two have a top terminal. I'll be happy to pay you for your trouble.
Thanks in advance.
mushroombrew- Noob
- Number of posts: 8
Age: 29
Location: Dalton, GA
Registration date: 2009-09-03
Re: Couple of questions...
Have you replaced the Caps?
As far as the resistors go, go by the color code on each. Only replace the ones that are out greater than 20 %.
The tubes are better staying with you. If they light then thats Half the battle. If you ship them you may never get them back unless you can trust the person. You can get a used Jackson tube tester for about the same price. Just make sure you test it first. They can be had at Ham-fests and swap-meets for $10- 25. Find a local Ham club, they can be found by listening to the local ham frequencies on 2 meters, even if you only have a handheld scanner. These Guys are always getting together to exchange equipt and radios and a lot are into antique radios.
As far as the resistors go, go by the color code on each. Only replace the ones that are out greater than 20 %.
The tubes are better staying with you. If they light then thats Half the battle. If you ship them you may never get them back unless you can trust the person. You can get a used Jackson tube tester for about the same price. Just make sure you test it first. They can be had at Ham-fests and swap-meets for $10- 25. Find a local Ham club, they can be found by listening to the local ham frequencies on 2 meters, even if you only have a handheld scanner. These Guys are always getting together to exchange equipt and radios and a lot are into antique radios.
_________________
Cliff---> KC7FXX Ham and GROL Licensed
Tubes, have something to glow about!
I am Radiosmoker at ARF

Resistance is Futile- Moderator

- Number of posts: 332
Age: 65
Location: Puget Sound Peninsula Washington
Registration date: 2008-03-12
Re: Couple of questions...
I have replaced the caps. The problem now is that I only get a very faint hum from the speaker and the 6v6-g output tube is being overvolted by about 40 volts on the plates and it hits about 300 degrees in a couple of minutes. Somebody in the past did some recapping and was using the old filters in combination with incorrect new ones. The also replaced some of the film caps with incorrect ones and completely removed two resistors including a 2-watt one. Point being, I cant trust anything he did. I just want to do a good job on this radio and I wanted to eliminate the possibility that any of the tubes, especially the 6v6, is bad. I won't be turning it back on until I get the repairs under the chassis completed. Also, I have a grundig s350dl radio, which does go through the 2 meter band, but it doesn't have ssb reception, so I can't hear any hams... Thanks for getting back with me on that. Oh, and BTW, the telephone wire thing in the other post that I mentioned... It was this radio. 

mushroombrew- Noob
- Number of posts: 8
Age: 29
Location: Dalton, GA
Registration date: 2009-09-03
Re: Couple of questions...
Sounds like somebody on a tight budget did the repairs.
_________________
Cliff---> KC7FXX Ham and GROL Licensed
Tubes, have something to glow about!
I am Radiosmoker at ARF

Resistance is Futile- Moderator

- Number of posts: 332
Age: 65
Location: Puget Sound Peninsula Washington
Registration date: 2008-03-12
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