| Author |
Message |
    
Tech548
Moderator
Username: Tech548
Post Number: 306
Registered: 5-2004
| | Posted on Saturday, October 02, 2004 - 11:41 am: | 
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I have a guestion for you Mag-257 owner/experimenters.
Have any of you ever heard or know of a NPC/RC modification that can be done to the Mag-257/357 series of radios? If so, would you care to share it with the other 257 owners here on our forum?
I am very curious if this radio is even capable of it.
Jeff. |
Excope
Junior Member
Username: Excope
Post Number: 10
Registered: 8-2004
| | Posted on Wednesday, October 13, 2004 - 11:57 pm: |
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Jeff, what exactley is a NPC/RC modification? I have a post 2000 year Magnum 257 that has been modified to talk with 10 bands and all bands have got five extra chanels. All of the extra chanels are labelded with an A. With the particular mod my radio has got the 100 and 10kc steps do not work only the 1kc works but I do no need a 10k switch for the RC chaneles if this is what you are talking about.
Excope, CEF 386, Crawdad
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Excope
The modification that was done to your radio was the frequency modification which consisted of a simple diode cut.
The Negative Peak Compression Reduced Carrier modification I am refering to is something all together different.
This (NPC/RC) modification pretty much turns the final section "linear" and greatly enhances the A/M mode.
Jeff
Tech548
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Tech548
Moderator
Username: Tech548
Post Number: 315
Registered: 5-2004
| | Posted on Thursday, October 14, 2004 - 12:08 am: |
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Well, it's has been more than a week since I made the above post concerning a possible NPC modification for the little Mag-257. It appears that either no one has experimented with this type of radio or it just can't be done.
I'll dig one up and see what I can come up with. If anything looks promising, I'll let you 257 owners in on it. Keep your fingers crossed.
Jeff
Tech548 |
Excope
Junior Member
Username: Excope
Post Number: 12
Registered: 8-2004
| | Posted on Friday, October 15, 2004 - 6:13 pm: |
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Jeff, I sort of figured that I was way off on this one. If you find anything out on the NPC/RC mod please pass it along I would be interested in this one. |
Tech548
Moderator
Username: Tech548
Post Number: 318
Registered: 5-2004
| | Posted on Saturday, October 16, 2004 - 4:58 pm: |
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Excope
That's what Copper's Forum is all about my friend....sharing information!
Jeff
Tech548 |
Stogie
Junior Member
Username: Stogie
Post Number: 26
Registered: 5-2004
| | Posted on Tuesday, November 23, 2004 - 11:11 pm: |
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I read somewhere a 1n914 diode and a 100 ohm 1/4 resistor does the trick. |
