Productive day yesterday as I came up with a good Colpitts type Oscillator circuit and with some more biasing adjustments we are getting 9.4 Volts PTP at the output side of the W3NQN Filter.
New oscillator board, the Amp and Keyer Board plus LPF
Thus our 9.4 Volts PTP translates to (9.4^2) * 2.5 = 221 Milliwatts which is a good start (from 50 milliwatts). All Devices are 2N2905's and PNP.
[JIC... Vrms = 0.35355 * Vptp or Vrms = 0.35355 * 9.4 or 3.32337 Vrms. Vrms^2/50 = power in WATTS. 3.32337^2/50 = 0.220895763 Watts or 221 Milliwatts. Or using my short cut Vptp^2 * 2.5 = power output in milliwatts. QED]
221 Milliwatts @ 14.060 MHz. Clean Pattern
The next step is to see if it is heard on the Reverse Beacon Network. That should prove interesting. For a pair of Ears in the final lash up, I am going to use my MC1496 Direct Conversion Receiver. The sweet smell of success!
Imagine that... my 221 milliwatts heard by DX at 2523 Miles
With 221 Milliwatts I was heard out to 2500 Miles which is about 11.3 miles per milliwatt. Good Show OM.
This home-grown stuff can be real fun stuff and for me better than 5X9, Park 12345. This little project is a throwback to when hams were hams. I engineered this rig and not something the average ham today can do! That is OK as the ham radio tent is large and those that can home grow a rig is almost infinitesimal. So, the 1% is an aberration but still a part of the hobby. We are a beacon to those who feel guilty they can only do contests, operate or watch you tube videos of YL's calling CQ POTA.
Time to think about integrating the Transmitter and DCR into a homogenous rig. The MC1496 DCR BTW has a PNP RF amplifier stage. I thought may be an Arduino to handle the switching. Sort of something old something new.
Them that know, survive. Will you survive?
73's
Pete N6QW
