Lumpy!

Lumpy!

Postby bstrahl [OP] » July 20th 2012, 5:58pm

I hear you're the go to Ham here, I am looking to install my mobile unit in my 96 astro. Are there any powered wires inside the van that I can tap into, or do I need to run a line through the firewall to the battery?

Thanks in advance, and 73's!

Bryan KB8THC
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Re: Lumpy!

Postby Lumpy » July 20th 2012, 6:21pm

Mount a big circuit breaker, rated appropriate to your wiring (50A or whatever), on the firewall near the battery. Wired that direct to the + side of your batt. Run the other side of that breaker via BIG cable (AWG 2-4), through the firewall to a convenient spot inside. Terminate that with your choice of terminal blocks, power pole fixtures, whatever. Then run separate fused lines from there to your radio(s).

If you like your rigs powered on/off with key/acc, put a relay in line with EACH separate radio (so each one draws a resonable amount of current).

Expect RFI gremlins. Consider ferrites on the power lines as close to the power supply as you can get them. I've never been a fan of those "choke plus cap" filters. Seems they always depend on a very long length of wire to achieve the choke. That invites voltage drop. An ohm of resistance can be a significant drop in a 12v system for a draw of 5-10-15 amps. 20-30 ft of wire, even relatively big wire, is easily an ohm or more. Those DIY chokes typically use 20-30 ft of wire on a snap link.

I've got an RFI gremlin that bothers me ONLY on 146.52. Every other freq, every other band is fine. RFI is created not just in the installed radio but in any 2m radio within about six ft of the van.

Big wire, direct from power source. Bond everything to ground.


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Re: Lumpy!

Postby StanVan » August 1st 2012, 6:15pm

Straight to the battery, as Lumpy says. I'd try it without any choke or noise filter. In addition to being a Ham as well, my early employment was installing business radios(before cellular). Noise free radios were the norm, although to be fair, it was never more than 2 or maybe 3 frequencies(or frequency pairs), not the vast number of freq's, we as Hams enjoy.

I run an FT-60 handheld, through a 2 meter amp(I rarely use UHF), and don't have any noise issues. Didn't have any with my older FT-50. Tried my FT-50 on my '73 Honda CB350F, and it was unusable due to ignition noise. But it wasn't coming in a power line(I didn't hook it up to power), so there was nothing I could do about it. Anything I tried on the ignition circuit had a detrimental affect on the bike.

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Re: Lumpy!

Postby cookiemonster59 » September 3rd 2012, 2:28am

Lumpy, Hey you old 'Salty Dog', haven't talked to you in since you helped me figure out my trailer wiring harness problem. :ty:

Which, by the way, works just fine now that I know which color & size wires go where, and man do I love those LED trailer lights!! :clap:

My current problem is my OEM CD/Radio displays the frequency ALL THE TIME. Once I select a station, I could care less about what the freq. is, however, knowing what time it is @ a glance would be nice. I D/L'd the '99 Owner's Manual fm this site, and took a quick glance @ the section on the radio, but I didn't see a picture of the exact CD/Radio that's installed in my van, and I didn't see anything on how to make the time show on the display all the time?? Any suggestions?? :confused:

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Re: Lumpy!

Postby Lumpy » September 12th 2012, 12:22am

Cook -

I don't know your radio, of course. Or even if "TIME ALWAYS" is an option. But on those radio's I have had, it's a little frustrating to figure out which button/knob does the SELECT and which does the MOVE THROUGH MENU functions. And they're not the same between brands. Blauplunkt is different than Kenwood, etc.

Generally, I think, there's one knob that allows you to page through menus, then a second button allows you to select menu choices. Like when you set the clock. One button changes from HOUR to MINUTE, the other button pages through those hours to advance to the next number. Then sometimes there's a 3rd button to push/turn to tell it "Yes I want THAT number".

Is there a model number or anything that identifies the radio? Maybe we could find an instruction document. I'm kind of blindly guessing without knowing more about the thing. I liked radios in the old days, of course. When there was ONE button for each function. But of course, in those days we had separate ANALOG clocks in the dash. Radios were radios. Clocks were clocks.

And get off my lawn you whipper snapper ... :character-oldtimer:


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Re: Lumpy!

Postby icebrrg3rd » September 12th 2012, 3:27pm

Lumpy wrote:in those days we had separate ANALOG clocks in the dash. Radios were radios. Clocks were clocks.

Lump


Unless those clocks were also tachs.
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Re: Lumpy!

Postby Jasen » September 29th 2012, 4:09am

I think Lumpy's talking about the pocket watch and transistor radio he carried with him on the horse.
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