Marauder-2. Delta Pulse. Troubleshooting.

[kt315]

By the way, could you tell me please what are the good values for the following resistors?


schema list
and board
R4 6k2 or 10k
R39 10k or 12k
R40 10k or 1k


R4... has relation to PULSE WIDTH. yes?
you have to get 120...150 - 450..500us PULSE WIDTH ('power', 'depth') range.
if you do not get... change the value.
less value - less PULSE WIRTH. more value - more PULSE WIDTH.
so 6k2 or 10k is ONLY YOUR CHOICE THERE.
just cause the capacitors and pot has to be scattered. it can be
5% but can be 20% and you get also spreading of PULSE WIDTH.

normal for DP ideal is 150-450us of PW range.

[tissaweera]

By the way, could you tell me please what are the good values for the following resistors?


schema list
and board
R4 6k2 or 10k
R39 10k or 12k
R40 10k or 1k


R4... has relation to PULSE WIDTH. yes?
you have to get 120...150 - 450..500us PULSE WIDTH ('power', 'depth') range.
if you do not get... change the value.
less value - less PULSE WIRTH. more value - more PULSE WIDTH.
so 6k2 or 10k is ONLY YOUR CHOICE THERE.
just cause the capacitors and pot has to be scattered. it can be
5% but can be 20% and you get also spreading of PULSE WIDTH.

normal for DP ideal is 150-450us of PW range.

Thank you very much kt315 ,
If I use 22k for R4 and 20n for C3 and 50K for pot , can I get more Pulse Width .

[kt315]

there are underwater cover up problems with PULSE WIDTH encreasing that you do not see (do not want to see).
first, you have to change MOS-FET on another, more powerfull type. also you have to add a driver for it in the schematic.
second, you can NOT use 3000-3200mAh AA 10 pcs anymore. you have to seek a batt with more high power.
third, you have to dig NOT by shovel. one hole 3 meters depth will be taken your one hunting whole day.
if you are ready to do that - do that.

I am not - !
http://www.geotech1.com/forums/album...chmentid=40307

[tissaweera]

https://www.ebay.com/sch/i.html?_fro...&_skc=50&rt=nc
are you seeking right??

Thanks . But only compounds are there . I want Heat sink that what you used in your DP please .

[kt315]

https://ru.wikipedia.org/wiki/%D0%9A%D0%9F%D0%A2-8

Use, reviews, criticism [edit] edit wiki-text]

Paste KPT-8 has become quite widespread in the territory of the former USSR due to its availability, cheapness and the availability of a standard that should ensure a stable quality. Nevertheless, paste is produced by many enterprises, including cases where KPT-8 pastes of various manufacturers differed in properties [3] [4].

The advantage of KPT-8 in the realization of a mass consumer is the low price (less than a ruble per gram in 2014 [the source is not specified 817 days]), the simplicity of production, the industrial scale of which is mastered in Russia.

The main agent-conductor of heat is zinc oxide (a semiconductor with a large width of the forbidden band), which is rubbed on a three-roll mill with silicone oil thickened with aerosil. Can be used with simple modifications as a replacement for mica and rubber heat-conducting gaskets. Gauze folded in 2-3 layers promavitsya KPT-8. The thickness of the gauze allows you to maintain the necessary clearance to maintain the desired thickness of the thermal interface (dielectric strength).

[chevesne]

I think you have an incomprehension between you.


@ tissaweera, look for "heat sink for TO220".

[kt315]

I think you have an incomprehension between you.


@ tissaweera, look for "heat sink for TO220".

may be... http://www.geotech1.com/forums/showt...ash-technology
i use and take heat sinks from old monitor boards. those vga... svga... them much there.

[tissaweera]

I think you have an incomprehension between you.


@ tissaweera, look for "heat sink for TO220".

Thanks chevesne

[tissaweera]

may be... http://www.geotech1.com/forums/showt...ash-technology
i use and take heat sinks from old monitor boards. those vga... svga... them much there.

Thanks

[tissaweera]

there are underwater cover up problems with PULSE WIDTH encreasing that you do not see (do not want to see).
first, you have to change MOS-FET on another, more powerfull type. also you have to add a driver for it in the schematic.
second, you can NOT use 3000-3200mAh AA 10 pcs anymore. you have to seek a batt with more high power.
third, you have to dig NOT by shovel. one hole 3 meters depth will be taken your one hunting whole day.
if you are ready to do that - do that.

I am not - !
http://www.geotech1.com/forums/album...chmentid=40307

In that case ,what is the best MOS-FET ? Is it STW9N150 or IRFP460 or STW20NM50FD ?

[Emiliano_070]

[Adjuntar] 40660 [/ ATTACH]

[Emiliano_070]

[kt315]

depth - PULSE WIDTH - in microseconds. scale from 100 to 500. or what you see really on your board.
disc - MAIN STROBE DELAY - in usecs. scale from 40 to 160. or what you see really.
GEB - SECOND STROBE DELAY - in usecs x 100. from 1 to 8, ie from 100 to 800. or what you see really on board.

remake.

[kt315]

In that case ,what is the best MOS-FET ? Is it STW9N150 or IRFP460 or STW20NM50FD ?

it seems your sun is very hot there. in my town girls from Sri Lanka working on a fabric. they are dressing warmly.
i will do some pics of them if meet.

[tissaweera]

You are right