Bought these exact boards from DXWORLD-e . My amp makes 1100 to 1200 watts depending on band, using the better LDMOS transistor : MRFX1K80H , simple awesome!
And don't ask you how you know this.. lol ... you just barely put a tinsy drop and work it in.. and if you buy a heatsink for the top use cheap heatsink compound very sparingly and make sure you have a couple thousands clearance between the top of the chip and the heatsink so that no pressure goes on the ceramic because of heat expansion
50v because that's what's going to draw the amperes when the amp is finished... make sure you back that bias pot way down before you hit it with the 50v and bring it up slowly...or it could go into self oscillation
There is no insulation between the circuit board and the copper? Do the soldering points on the circuit board press directly onto the copper plate?
Bought these exact boards from DXWORLD-e . My amp makes 1100 to 1200 watts depending on band, using the better LDMOS transistor : MRFX1K80H , simple awesome!
This compound is electrically conductive and if misapplied, can easily cause a short between the Source and Drain resulting in transistor failure.
And don't ask you how you know this.. lol ... you just barely put a tinsy drop and work it in.. and if you buy a heatsink for the top use cheap heatsink compound very sparingly and make sure you have a couple thousands clearance between the top of the chip and the heatsink so that no pressure goes on the ceramic because of heat expansion
Is the 19 ohm resistor that you put at the output of the 4:1 input to match the impedance of the transistor?
I really enjoyed that step by step.. Please make more videos of this type. Thank you. PY1LO.
you missed one step setting the temperature regulated bias circuit :-) can you please tell us how it's done sir
Hello! Where do you connect the ammeter for the final adjustment, is it on the 50 volt or the 12 volt supply?
50v because that's what's going to draw the amperes when the amp is finished... make sure you back that bias pot way down before you hit it with the 50v and bring it up slowly...or it could go into self oscillation
nice video can you please post the sound track name and where you got it from thank you
ориентирована продукция исключительно на буржуев.все по английски. кто платит тот и заказывает .........язык