Ranger 2950 buzz/hum on recieve

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pinnywells
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Ranger 2950 buzz/hum on recieve

Post by pinnywells »

Anyone help I have a ranger 2950f that has a buzz/hum on recieve.any help would be perfect thanks.
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ghost123uk
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Re: Ranger 2950 buzz/hum on recieve

Post by ghost123uk »

Welcome Transmission1, where you can learn all you need to, and lots that you don't :)

Well, lets not worry about "Hi, I am new here" etc ;) plus, as this is a technical question, it really should go in the relevant section, here -> http://www.transmission1.eu/viewforum.php?f=2= (or perhaps here -> http://www.transmission1.eu/viewforum.php?f=53 I am quite new here too! - A mod might move it for you.)

My favourite radio the Ranger 2950 :thumbup:

Anyway, straight to the issue we go:-

Does it sound like a 50Hz hum/buzz? like this = CLICK HERE, or more of a higher pitched whining sound?

What PSU are you using? (try it on a car battery, being VERY careful to get your red & black (+ve and -ve) the right way round !! = does it still do it?)

Any fluorescent lighting nearby?

Any TV or computer monitor close by?

Does it change depending whether an aerial is connected or not? (if "yes" do you own a dummy load to plug in and see what happens then)
John, on the S. Cheshire / N. Shropshire border. 26TM953 / muppet handle "Grey ghost"
Don't just monitor, key up and talk, otherwise everyone thinks no one else is out there !!!
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Admiral
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Re: Ranger 2950 buzz/hum on recieve

Post by Admiral »

"If you're not sure where to post, try here!"
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ghost123uk
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Re: Ranger 2950 buzz/hum on recieve

Post by ghost123uk »

Admiral wrote:"If you're not sure where to post, try here!"
:thumbup:
John, on the S. Cheshire / N. Shropshire border. 26TM953 / muppet handle "Grey ghost"
Don't just monitor, key up and talk, otherwise everyone thinks no one else is out there !!!
pinnywells
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Re: Ranger 2950 buzz/hum on recieve

Post by pinnywells »

I just won it on eBay as faulty so don't know what the sound is as yet just getting some into before it arrives so as to give the rig doctor the heads up if it a fault someone has heard off the listing says gurbble/ hum on all incoming bands
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timbob58
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Re: Ranger 2950 buzz/hum on recieve

Post by timbob58 »

oh and Welcome to the forum 8)
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Re: Ranger 2950 buzz/hum on recieve

Post by timbob58 »

opps
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pinnywells
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Re: Ranger 2950 buzz/hum on recieve

Post by pinnywells »

Opps as in not good
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ghost123uk
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Re: Ranger 2950 buzz/hum on recieve

Post by ghost123uk »

timbob58 wrote:opps
:?
John, on the S. Cheshire / N. Shropshire border. 26TM953 / muppet handle "Grey ghost"
Don't just monitor, key up and talk, otherwise everyone thinks no one else is out there !!!
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Re: Ranger 2950 buzz/hum on recieve

Post by Transwarp »

pinnywells wrote:I just won it on eBay as faulty so don't know what the sound is as yet just getting some into before it arrives so as to give the rig doctor the heads up if it a fault someone has heard off the listing says gurbble/ hum on all incoming bands
Buzz/hum could be anything or nothing at all, wait until you get it then see.
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George EI7KO
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Re: Ranger 2950 buzz/hum on recieve

Post by George EI7KO »

Wit it solder side up and lid off when you get it have a look half way down one side. In line with where the bracket bolts in. On some of these the regulator legs can break away from the board. You'll see it straight away as the solder will be broken. Or with reference to the bracket bolt, if too long a bolt is used there's a cap right in line with the threaded insert in the radios frame and the cap gets pushed over and damaged. I had one here with a hum and no receive and it had both of these faults.
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StormShadow
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Re: Ranger 2950 buzz/hum on recieve

Post by StormShadow »

I'm no expert but I do have some knowledge of those symptoms, its most likely to be a faulty capacitor or 2 or maybe a dry joint somewhere on one of the capacitors I'd also check the crystal filtering in the RX section... it could be a number of things really
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