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   Home   Help Search  
Pages: Prev 1 ... 5 6 7 8 9 [10]
 91 
 on: Today at 09:42:54 AM 
Started by AH7I - Last post by AH7I
Inexpensive?

I've been looking at postings for used Motorola stuff but have a lot to learn about it before buying anything.

I found a good looking, used, UV5 with the larger(charging connection on the side) battery. Got it for $20 from a conspiracy enthusiast. He  had purchased it to scan for "numbers stations". Once I scrounge some connectors to get charging and programming cables together, I'll put in the local repeater frequencies and report back on how it does around downtown Honolulu and Atlanta. Conspiracy guy thinks 'someone' took his charger! In town living is always interesting. Entering the local NOAA weather frequency from the keypad was pretty easy. Audio is nice and clear, even when loud.

-bob

 92 
 on: Today at 09:32:57 AM 
Started by KD0ZGW - Last post by DRBEN
Everyone, thx for suggestions.  I did provide aerial views with proposed tower location.  County responded with a drawing with a red line running E/W behind my house and identified all 10 acres as "back yard".  Any other location would require a variance. 

So my plan going forward is to choose an "acceptable" location and add 10' to the tower to make up for most of the lost elevation.

No doubt much quicker and probably less costly than getting a variance (which is not guaranteed).

As Sun Tzu said in The Art of War:

"He will win who knows when to fight and when not to fight." and "Who wishes to fight must first count the cost."
 

 93 
 on: Today at 09:30:47 AM 
Started by KG9SF - Last post by W8JX
I gettered my NOS GU74b's by putting them in the amplifier and transmitting at my usual 1500 watts

Given that a GU74B has a indirectly heated cathode that does gettering, transmission has no effect on gettering of tube.

 94 
 on: Today at 09:26:29 AM 
Started by AC8SW - Last post by W8JX
I agree with  JX.   1/4 wave stays  verticle, while a 5/8th , waves and the   antenna to  body   relationship varies, thus the impedance and  swr and radiated power.
But, rule of thumb is,,,, the greatest  signal strength is in line with the most  car body.
Antenna on left rear fender,  radiation is greatest  across body to  right front fender.
so  slap a mag mount in the middle of the roof,  or   take out most  interior  dome lights,
punch a hole from the inside  for  NMO mount.  run cable thru the headliner to the door post  etc.
for mag mount, i run the cable down between the doors,drill a hole at bottom of the door post
and get cable inside.   Clear silicone to tack the  cable to the  body to keep the wind from moving.    But then I have a car for my  'use'    , not to   look at or have someone admire .
I never wash cars.

I glued a mag mount 1/4 wave to a plow truck of mine with silicone glue to keep moisture from under magnet too. I also used glue to tack cable as poster did above. A car/truck is a tool and I and not worried about a fashion statement but rather best possible performance in a lower profile.

 95 
 on: Today at 09:18:13 AM 
Started by ONAIR - Last post by ONAIR
Looks like 10M is open again today at 12 noon EDT on the East coast US!!   Smiley

 96 
 on: Today at 09:17:47 AM 
Started by KB3FFH - Last post by N6QH
If a single needle SWR meter is connected backwards in the transmission line, will it read reflected power when set to read forward power and vice versa?

If so, I can use this to check the reflected power calibration and get accurate SWR.

(Hopefully a clearer restatement of the question in my post above.)

 97 
 on: Today at 09:04:25 AM 
Started by ON5MF - Last post by W8EIR
I have a 7300 and only use FSK for RTTY, and it works well. I don't use the memory keys for RTTY, its just easier to press F1 and so on as needed. Especially for contesting and chasing DX.

I think I saw a picture somewhere that showed an on-screen QWERTY keyboard on the IC-7300 - I guess you could use that to tap out ad-hoc text when you need to if you aren't using a computer.  

I may need one of these after all ... must ... resist ...

There is an onboard keyboard on the radio, I don't know if it can be used like a regular keyboard for sending text, for either RTTY or CW, never tried it. Smiley Come to the dark side, this radio, get you must.

 98 
 on: Today at 09:01:55 AM 
Started by KG9SF - Last post by N4RSS
I gettered my NOS GU74b's by putting them in the amplifier and transmitting at my usual 1500 watts

 99 
 on: Today at 08:55:34 AM 
Started by ON5MF - Last post by W3PH
I have a 7300 and only use FSK for RTTY, and it works well. I don't use the memory keys for RTTY, its just easier to press F1 and so on as needed. Especially for contesting and chasing DX.

I think I saw a picture somewhere that showed an on-screen QWERTY keyboard on the IC-7300 - I guess you could use that to tap out ad-hoc text when you need to if you aren't using a computer. 

I may need one of these after all ... must ... resist ...

 100 
 on: Today at 08:48:01 AM 
Started by KB0TXC - Last post by N1UV
There are commercial radios that will work on 900 - some without modification.  Motorola (eg, GTX900) and Kenwood (eg, TK981 or TK431) are two such manufacturers (there are others).  Some links to get you started are below, although just Googling will get you plenty of information.

http://www.kw902.com/index.html
http://www.repeater-builder.com/motorola/gtx/gtx-info-mobile.html
http://www.sd900mhz.com/index.htm

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