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I don't have an amp meter on the supply that feeds that amp but I will make a point of checking for you.

4 pill mosfet I have a similar amp with 4 of them 75W mosfets in it. it won't do 500w. Gets close; starts off at about 440 pep and backs off to just over 330 or so once it heats up. It gets hot. Real hot. I put a 220v fan on top to help the internal fan but it seems that the heat just can't...

cre RF circuit I hope you can still share it privately Duster...

NOPE. They don't care. They think we all Hillbillies cos we don't have a spectrum analyser in our shacks so we know nuttin.

Mk3 display That is good to hear Duster! We have heard no other issues with the display as far as I know from anywhere else. There is no such thing as a re-badged MK3. The changes are just not that much to even warrent calling it Mk3. we were expecting a new board and a dot matrix display in...

Coils Homer, How far below the bottom radiator should the coiled choke go? As close as possible or within 12". thanks, Dave

Don't the 257's come standard now with an IRF 520 mosfet in the final?

power on the S-45HP If you don't use a fan on the finals then best keep the power down to 40wPEP. Even at those levels the RX-75 will get very hot. AM it will get hotter. They keep the FM power down to 20w max for a very good reason!!! Put a decent fan on the heatsink that runs continually...

Our Take on the M-8800 a bit of a quick review. just wondering if they are all like this or are they modifying things as they go out the door. The Recently Released MaxLog M8800 | 91DD018

Power I am sure Mike will be able to get 40w out of one...but in all honesty I prefer to keep the radio down and run an amp..that way they both run cool and sweet. As long as the audio is punchy they will get out OK with the 25w in today's skip conditions, but talking locally may be...

maxlog 8800 Hey Tom, is this the first of these radios that you can't change the colour on? I was told that our radios have a hardware mic gain control...wonder what he took off to do that? I guess thats why they were late. Still no news on the software side of things...Should be down in kiwi...

rx150 No, it is dependent on the output of the radio. If you see 100 you will be in good shape but expect to see a lot of heat too... unlike the rx75 it is a standalone amplifier...can't help thinking that little RMkl203 stuck on top of the case would be a cheaper and easier option...

adjustment All the pots are labelled but you will need a magnifying glass to read it. The one you want should be labelled AMC

MK3 Optima If some one is selling them locally in the US for US$250 then go for it... yeticomnz will either have to drop the price and warranty or stop supplying the US market. The manufacturer is supplying direct.

Post a review and some internal pictures because I have not heard where ours are! They maybe on the way and they may be stuck and they may not have been sent...not hearing much out of the supplier any more!

M-8800 No, waiting for ours to arrive so we can put them thru their paces. They will be available ex NZ when we get them. I will post the results on the blog. Don't expect too much other than a version 5 anytone clone, but the dials and knob layout looks interesting. cheers, Dave

M-8800 I will sell you one of mine if they ever arrive. Best wait till these get tested... cheers, Dave

Pictures Pictures of the board here A new 1 x 4 TX2000M amp from Magnum | 91DD018

mosfet amps I recently tested a prototype tx2000 amp, 1 7530 ekl mosfet driving 4. It had a fan on the bottom cooling the internals similar to the one in the picture above. Nicely made. When cold it hit 440w PEP easily with 40w drive but the thing heated up quickly and dropped back to about...

Mk2 to mk3 It involves sending it back to the factory.