Author |
Message |
Jameslarson
Intermediate Member Username: Jameslarson
Post Number: 318 Registered: 4-2006
| Posted on Thursday, April 12, 2007 - 10:07 pm: |
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OK. I'd like to put variable power in this thing. Just tell em what to do. I already added the channels, now it's time for the Variable power. Show me the way. I am looking to dead key 1.5 and swing to 4 or 5 when using my 667,,,and swing higher with it off. Right now I am dead keying 4 and swinging 5 (too much for the 667). Show me how. Thanks. |
Patzerozero
Senior Member Username: Patzerozero
Post Number: 3609 Registered: 7-2004
| Posted on Friday, April 13, 2007 - 5:53 pm: |
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eaiest way to add variable, remove wires from rf gain or squelch, tie 'em together 'wide open'. remove AM power vr pot, & put onto whichever front mount pot you disabled. OR, you can wire them to the dim or hi/lo switch 1st, then to the pot, so you have use of rf gain or squelch. |
Hollowpoint445
Senior Member Username: Hollowpoint445
Post Number: 1476 Registered: 6-2004
| Posted on Friday, April 13, 2007 - 8:49 pm: |
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Disable squelch? I guess that's cool because I don't use it anyway, but RF gain? NO WAY! I'm constantly adjusting RF gain to take advantage of the gain curve to peak the signal/noise ratio. I don't know how I'd get along without it. I'd sooner get rid of mic gain which I rarely use anyway and is redundant if you're using a powered microphone as most people seem to do anyway. Aack! - Bill the cat
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Patzerozero
Senior Member Username: Patzerozero
Post Number: 3610 Registered: 7-2004
| Posted on Saturday, April 14, 2007 - 4:24 pm: |
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that's why i suggested disabling one of the switches. had an XL here last week to wire a mic for, & it was done like that. was trying to test it & couldn't figure out what was controlling what. once i realized someone disabled brt/dim & wired rf gain & variable into it, i thought WOW, that's a great idea. i'd thought of it before, but never implemented it. |
Hollowpoint445
Senior Member Username: Hollowpoint445
Post Number: 1482 Registered: 6-2004
| Posted on Saturday, April 14, 2007 - 8:22 pm: |
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That is a pretty cool idea, but I'd rather have both controls available at the same time. I think if I'm going to bother opening the radio to do something like that, I'd just get a dual pot and knobs from a junk radio and replace one of the single pot controls. Some company should make a replacement chassis/cover/faceplate that's twice the normal height, with lots of places to insert pots and switches for nuts like us to customize our radios. A couple of spots for meters would be cool too. I always wanted a mobile with more than one meter. A slot for a frequency counter wouldn't hurt either. Aack! - Bill the cat
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Kid_vicious
Senior Member Username: Kid_vicious
Post Number: 2488 Registered: 9-2004
| Posted on Saturday, April 14, 2007 - 11:17 pm: |
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james, get yourself a suitable 5K ohm linear taper potentiometer. if you dont mind putting a hole in the radio, just mount it where you want it. if you do mind, remove one of the controls on the front that you dont use and mount it there. solder three wires to the pot. (a 2 conductor + shield cable would be better) unsolder VR10 from the board and solder the three wires from your new pot to their respective holes. (VR10 is in the rear right corner of your radio) while you are in there, replace TR41 with a 2N6487 or an NTE152. makes for nicer AM audio peaks. if you cant turn the power down far enough, remove R196 and replace with a jumper. best of luck, matt anyone wanting a "clean signal", just look to the left and build one of these!!!
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Dale
Advanced Member Username: Dale
Post Number: 760 Registered: 12-2002
| Posted on Sunday, April 15, 2007 - 9:05 am: |
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u could do that but instead of drilling a hole in radio put the knob on the back of rafdio by coax jack exisiting holes already there and it keeps a nice clean look to your radio dale/a.k.a.hotrod cef426 cvc#64
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Jameslarson
Intermediate Member Username: Jameslarson
Post Number: 328 Registered: 4-2006
| Posted on Sunday, April 15, 2007 - 6:49 pm: |
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Thanks all for the help. |
Dale
Advanced Member Username: Dale
Post Number: 770 Registered: 12-2002
| Posted on Sunday, April 15, 2007 - 9:21 pm: |
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welcome leave us know what ya do dale/a.k.a.hotrod cef426 cvc#64
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Monk
Junior Member Username: Monk
Post Number: 29 Registered: 2-2002
| Posted on Tuesday, May 01, 2007 - 5:22 pm: |
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I install the variable power on the SWR adjust pot. Unsolder the wires from the SWR adjust pot. Take the two wires that aren't to ground and solder a 2.2k ohm resistor between them. Unsolder the rf power trim pot from the board and run wires to your SWR pot. You gain the variable power and don't lose the SWR function. Monkradio In the NW corner |
Jameslarson
Intermediate Member Username: Jameslarson
Post Number: 375 Registered: 4-2006
| Posted on Wednesday, May 09, 2007 - 9:33 pm: |
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Kid writes: "while you are in there, replace TR41 with a 2N6487 or an NTE152. makes for nicer AM audio peaks." Where is TR41 (Q41)? I can't find it. Also, If I decide to upgrade the final, are there any other parts that need to be chanegd or any ohter tune ups that need to be done? Or is it as simple as simply installing a new part? Thanks. |