| Author |
Message |
    
Hootyal
| | Posted on Friday, January 31, 2003 - 7:10 am: | 
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Posted this in the open forum also..Anybody out there know of this mod and how to apply it to a uniden washington?
Thanks, HootyAl |
307
| | Posted on Friday, January 31, 2003 - 8:16 pm: |
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What is PPE?
307 |
Ss8541
| | Posted on Friday, January 31, 2003 - 11:46 pm: |
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307, everyone knows that ppe's are p-urple p-eople e-aters.
hootyal, i am pretty sure that there is an npc/rc mod for this radio(limiter removed, finals volted). i have not tried a ppe version on this radio(limiter in circuit, finals not volted) yet. i have tried on the 148/grant chassis(modulation circuit very similiar to washington). the ppe works good with the 1st few syllables of modulation and then a time/buffer circuit kicks in to bring audio to a symmetrical waveform again. but before it does, asymmetrical modulation of 100% negative mod. and approximately 175% positive mod. is occuring. the waveform is clean with little distortion. i was working on this quite some time ago, and haven't had time to get back into it to work the bugs out.
if you go the npc/rc route, save yourself the time and trouble and just cut the limiter as the only step. the results of the npc/rc is very similiar(i have tested it). i don't condone cutting limiters at all, but you will be at the same point either way.
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Hootyal
| | Posted on Saturday, February 01, 2003 - 7:55 am: |
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Thanks for the advice ss8541! I did just that...cut r104 and it is louder and still very clear. Some mod sites suggest cutting r131...tried that first and it cut out the recieve and transmit..scared the bjesus outta me!!! Thanks again, HootyAl |
Adshar64
| | Posted on Sunday, June 01, 2003 - 5:57 am: |
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1. Remove TR32
2. Jumper out R123.
3. Add a 10 uF 25 or higher volt electrolytic cap to the following
spots: Attach the positive leg to pin 9 of IC4, and attach the
negative leg to the junction of R121/D62/R204.
4. Set the driver bias to 50 mA.
5. Set the final bias to 100 mA.
6. Solder the end of the final bias wire that is furthest from
the final transistor to the cathode (banded) end of D60.
7. Set the dead-key power to 1.5 watts using VR6.
8. Tune the RF amp chain coils (L36 and L26 through L29) for
maximum peak (modulated) output power.
9. Double check the dead-key power. If it's higher than 2
watts, use VR6 to set it to 1.5 to 2 watts.
The maximum average
power should be 10 to 12 watts. And the maximum peak power should
be around 25 watts. |
Kc0gxz
| | Posted on Monday, June 02, 2003 - 6:52 pm: |
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Ss8541
You must be really old. I haven't heard the "Purple People Eater" since 1957.
Jeff, kc0gxz. |
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