开云体育

I have enuff test equipment. I only lack good unsoldering equipment. What I have has been fine 99%?of the time but I just can't?

get this transistor unsoldered. I'm pretty close to believing that the transistor leaks under the full 14 volts but does not leak under the?

DVOM diode test. That's why I tried to unsolder the collector and test cuzz that would have answered my?questions.?

I do like to ask on groups?like this cuzz you never know who may have had the same issue at one time.

Thanks for your help. I'll let you know.

On Thu, May 29, 2025 at 8:50?PM Gary Cook via <gac=[email protected]> wrote:

The transistor needs to be completely removed to properly test it. If it's still good, start testing everything around it. Keep in mind that if you don't have adequate test equipment (and knowledge), you can do a lot more damage trying to do it yourself.

Gary

On 5/29/2025 7:43 PM, Bob via wrote:

Oh I have, with the finger, it's Q6. I tried to get the collector unsoldered so I could test but I can't get it unsoldered. I have the electric solenoid

desoldering tool, I have solder braid, and the manual "clicker" type solder sucker but I can't get it off. I may have to find someone locally that

can unsolder that for me. My thoughts were if I remove only the collector and the current draw disappears, I found it.

Bob W4JFA
?

On Thu, May 29, 2025 at 8:05?PM Gary Cook via <gac=[email protected]> wrote:

If you have a thermal camera, now's the time to use it. If not, start using your finger to find the overheating device.

Gary

On 5/29/2025 7:01 PM, Gary Cook via wrote:

Start checking diodes, resistors and capacitors until you find it.

Gary

On 5/29/2025 6:56 PM, Bob via wrote:

Hi all,

If anyone is familiar with the TS-50, I could use some advice.

The radio had no RF out. Was narrowed down to the final board.

It then started blowing fuses. It's not now and I don't know why however

it does draw 6 amps on receive and also draws 6 amps with the power off.

Checking the final transistors, in circuit, they test OK with a DVOM on diode

test. I read no shorts from collector to base/ground. Reverse polarity diode

tests good.

This should be a simple diagnosis so maybe I'm missing something?obvious?

If anyone has any hints I sure would appreciate it.

73, Bob W4JFA