[Amps] 3-500Z pin comes unsoldered

[Alek Petkovic]

More than that. It most likely means the spring tension on the clips is 
inadequate and needs to be fixed. You can blow a hurricane at the socket 
pins, if the springs are weak, the connection to the pins will be loose 
and you are still going to melt the solder.

I believe that I have said on many occasions, tobite the bullet and get 
some new sockets from China and the spring tension issue will be a thing 
of the past.

See 
http://www.mableaudio.com/en/productview-560_5pins+Gold+tube+sockets.html and 
tell Miss Mable I sent you. I'll get my kick back next time I visit her. 
:-)

73, Alek. VK6APK

On 14/05/2014 10:05 AM, Steven Grant, W4IIV via Amps wrote:
> When the pins get hot enough to melt the solder, it means they are not getting enough air. make sure you have enough airflow to cool them. In amps with chimneys, the air comes from the bottom of the tube (henry, drake L-4, ect.). Some amps use a transverse cooling system (Amp Supply, Heathkit, ect.). Make sure all filters are clean, and if you are using AM or RTTY to make sure you reduce power. to fix a pin, I recommend a Torch, or a Weller D550 soldering gun. I also put a small piece of wire in the pin to help the solder anchor better. I hope this helps.
>
> P.S. Some amps just have terrible cooling systems, and cooling the pins seems to have been forgotten. Take note if the pins are not directly cooled and try to fix if you can.
> Steven Grant W4IIV
> On Tuesday, May 13, 2014 4:01 PM, Larry<lknain at nc.rr.com>  wrote:
>
> I had a brand new Henry years ago that would melt the solder out of tube
> pins. I got rid of it.  I wondered later if perhaps the problem was too much
> RF etc running around in the box (e.g., bad bypass caps). The amp had a
> distinctive signal on 80M.
>
> 73, Larry  W6NWS
>
> -----Original Message-----
> From: Gary Smith
> Sent: Tuesday, May 13, 2014 1:33 PM
> To: amps at contesting.com
> Subject: [Amps] 3-500Z pin comes unsoldered
>
> My dad's PT2500 has a problem where one of the 3-500 pins gets hot
> enough it unsolders. I'm going to have a look at it&  am thinking
> maybe there's a poor connection on that pin/clip but maybe its
> something relating to a defective component.
>
> Before I open it up I'd appreciate suggestions on what to
> specifically look for that might not be obvious to the eye, might
> save me some time reinventing the wheel.
>
> 73,
>
> Gary
> KA1J
>
>
> ---
> This email is free from viruses and malware because avast! Antivirus
> protection is active.
> http://www.avast.com/
>
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
>
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
>    

-- 
http://www.qrz.com/db/vk6apk
http://www.qrz.com/db/vk6ap

Family Businesses:
Petkovic Air&  Gas.  petkovicag at bigpond.com
SP Electrical. www.spelectrical.net.au
Hampers by Hand. www.facebook.com/hampersbyhand


---
This email is free from viruses and malware because avast! Antivirus protection is active.
http://www.avast.com