[Laser] laser blowed XE2AT

[Art]

Hi Al,

2.3 volts is too low to make any current flow in the laser.

If you are trying to run the laser on the small batteries that came with 
the laser, then you need to stop. Those batteries may power your laser for 
awhile, but they don't have much capacity.

The 9 volt battery with the dropping resistors is the same situation, 
inadequate current supplied for more than a few minutes of laser power.

With 3 C or D batteries, you should be able to power your pointer for quite 
awhile.

Also, before throwing the lasers in the trash, you might try powering them 
with the C or D cell batteries as explained above. The lasers might no be 
burned out at all, they might just be suffering from  low voltage input.

I do have one other thought, although it's a long shot. You mentioned your 
air is clear and very dry there. I'm wondering if static could have damaged 
your lasers (they are an open circuit with only a single resistor and an 
open switch so they could easily be damaged by static).

A  1 to 10 meg ohm resistor could be placed across the laser diode (in 
parallel) to prevent static from building up due to your dry climate.

Hope this helps. Please let us know when you get your VUCC on laser. Sounds 
like you can do it with the improved Ramsey's.

Art


At 09:49 PM 6/24/04, you wrote:
>Thanks to all that answer the questions about pointers, yes I am using a 
>very cheaper chain laser made in china is only > 1mw and the price is only 
>1.10 USD !!! I know , I know .... but is the only that I can get here in 
>Mexico, I see today the 2 pointers used for the last 25 km and one of them 
>is very low !!!! I am using the K3PGP   diagram with a 9V battery and 7 
>diodes, I chek the volt supplied to the pointer and is just 2.3 volts, 
>this laser have 3 batteries of 1.5 volts and worked fine maybe 2 hours 
>what happen ?
>  The problem  is in the quality of the pointer or the is the power 
> suplied to the laser..
>  the other TX is working fine !!!
>there are some problem in the diagram ?