Well, I'm not having as bad of a time with this as you are over there...
Ok, let's get back to figuring out the EKL and just how much power do we need to trigger the MOSFET
At the current time - you get about 3.8W with the EKL part in there. You will have to find a combination of "parts" that make the EKL produce a higher voltage to "trigger" the MOSFET more on to gain more power from it.
- That is; If you wish to still use it.
Right now, - I hope you are using a
3.3KΩ - Orange - Orange - Red
390Ω (ohm) Orange - WHITE - BROWN
- and the Diode a typical 1N4148
There are other threads that show what OTHER radio makers use for their EKL equivalents - you'll see the values change considerably amongst the various stages and types of designs are similar to a degree, but still require varying values - so remember we had to start somewhere.
One thing I wish to caution you about - deals with many lessons learned in Unidens HR2510 chassis regarding cycling current and self resonance that will make this seem difficult and if we are not careful - can blow parts and even damage the radio beyond repair from that damage.
It also is why I had to take out so many parts then sub in to develop the amount of power needed and nothing more to make the MOSFET work - not all radios are simple like the Cobra 29 or 25 or even Unidens' PC-66/68 or PC-76/78 series - so the other makes of radios seem to throw in more - makes this conversion more difficult to "get right" and not go into self resonance and self-destruct because of all those extra parts - and once you start to work with MOSFET you can see how simple they are to use.
They just don't like lots of stuff processing the signal and getting in the way...
You do not want to encounter a "ringing effect" that is a self-resonant and re-cycling RF current that is not part of the 27MHz - so you'll notice the Receive seems to die-down but you don't know why - this is one of the symptoms of the ringing - the self-resonance generates such a strong signal (like a carrier) in a spectrum of RF - it overpowers the Receiver but since the receive is not set up to hear it - you don't hear anything instead.
Here are some threads to help get your feet a little stronger into this...