The holidays ..... and the Triumph, have been eating up my time ~ but ~ today I carved out a bit and pawed through the "junk box" to find bits to assemble the VR conditioner circuit.
R1 the 300 ohm transmission line termination resistor .... 300 is a value that is not commonly manufactured, but, 330 was easy to find and in 1/2 watt size too. that'll do.
R2 18 Kohm ...... another rare critter. I built what I needed with a pair of 10K and a pair of 100K resistors in a series parallel arrangement:
100K in series with each other = 200K
10K in series with each other = 20K
:then:
the 200K in parallel with the 20K = 18.2K
R3 and R4 are common sizes .... easily found.
the capacitors are all common enough sizes ..... but, time was pressing so I settled with a 220 and a 100 pF in parallel to emulate C2, and substituted a 0.15 for C4 the bypass cap.
I then got to building the circuit "dead bug" style..... Its not pretty, and, won't win any prizes in the engineering lab,,,,, but - there is a long tradition of hobbyist and hackers using the technique. (see photo)
The embarrassing part is when more than half way done ..... and one realizes that dyslexia has bitten yet again. DOH. I had flipped the board over in my head and was assembling a mirror image of what is needed.
This one goes in the trash ...... I think I'll go back to putzing with the triumph for awhile.