Restoration-mods. old pistols

[Esteban]

One was restored. The other need reverse engineering and some cleaning and paint.

[aft_72005]

Hi Esteban
Please more explain about both.

[Esteban]

Originally Posted by aft_72005

Hi Esteban
Please more explain about both.

The restored is a type off-resonance and radio type. The other is a BFO and an optic system... The dissambled wich need restoration/mods is years 70s and begining 80s.

[aft_72005]

Originally Posted by Esteban

The restored is a type off-resonance and radio type. The other is a BFO and an optic system... The dissambled wich need restoration/mods is years 70s and begining 80s.

Are you know ,What found with both?

[Esteban]

Originally Posted by aft_72005

Are you know ,What found with both?

I saw in functionment since 1979 and found many things with similar. There are "1,000 variations" or small mods. One use FM transmitter, other no... etc.

[Esteban]

Dissambled. New circuits will be inside, but based on old schematics.

[Geo]

Originally Posted by Esteban

The dissambled wich need restoration/mods is years 70s and begining 80s.

Hi Esteban.
If you are boring to restore it.... i can make it for you

Regards

[detectoman]

hola esteban veo que esa pistola es igual a la que usaba tu primo en texas, dime por favor que desventajas tiene en comparacion con las otras nuevas que has dise/nado, y dime si compite con ellas en estabilidad discriminacion y rango, te envio un abrazo inventor de stuff increibles
hello staban i see this pistol semms how your cousin handed in texas city, say me please what advantages or vantages has in comparation whit the other new of your what you today build, y same is comparable whit these in stablility and discrimination and range, i see this may be is bfo and fm, ist true? i send to you one embrace of your friend in hobby detectoman
p.d my congratulations

[Esteban]

Originally Posted by detectoman

hola esteban veo que esa pistola es igual a la que usaba tu primo en texas, dime por favor que desventajas tiene en comparacion con las otras nuevas que has dise/nado, y dime si compite con ellas en estabilidad discriminacion y rango, te envio un abrazo inventor de stuff increibles
hello staban i see this pistol semms how your cousin handed in texas city, say me please what advantages or vantages has in comparation whit the other new of your what you today build, y same is comparable whit these in stablility and discrimination and range, i see this may be is bfo and fm, ist true? i send to you one embrace of your friend in hobby detectoman
p.d my congratulations

Is similar that the pistol used in Texas in the begining of the 80s.

Es similar a la usada en Texas al principio de los 80.

[Esteban]

Originally Posted by Geo

Hi Esteban.
If you are boring to restore it.... i can make it for you

Regards

Thanks very much!

Regards

[Geo]

Originally Posted by Esteban

Thanks very much!

Regards

When you are ready tell me to give you my address

After 2 hours i will go to test the TDi and 2... 3 pistols.
I will inform abour results

Regards

[Astrodetect]

Esteban I wanted to ask you what is the difference between off resonance and BFO?
Thanks

[Qiaozhi]

Originally Posted by Astrodetect

Esteban I wanted to ask you what is the difference between off resonance and BFO?
Thanks

Hi Astrodetect,

BFO and Off-resonance detectors are closely related, as they both rely on a metal target causing the TX oscillator to shift in frequency. In the BFO the TX signal is mixed with the output from a second internal oscillator (known as the local oscillator) to produce a beat frequency in the audio range. When the TX frequency changes, the audo note also changes. However, in the Off-resonance detector, the TX output is fed into a tuned circuit that is tuned off-resonance. The output of this circuit gives an amplitude change which can be used to trigger an audio output or a meter. So the only "audible" difference is that the BFO has a constant threshold tone that changes in frequency, whereas the Off-resonance detector can be silent search and only beeps when a certain threshold is reached. They both have about the same sensitivity to metal targets.

[Astrodetect]

Thanks Qiaozhi for your explanation. Does anybody have a complete schematic for a stable off resonance detector here?
Thanks again