No joy here, but I promised to post my results.
After "upgrading", the performance was noticeably worse in my case. Especially and not unexpectedly on the higher bands. See below.
So I personally will continue using an inline regulator to protect from overvoltage but am switching from 7812s to the Low Dropout (.5v vs. 2v) LM2940C-12.
MMDV...
And thanks to Hans for providing such high quality circuit boards that we experimenters can solder, unsolder, solder, unsolder, and solder again and have no noticeable impact to the circuit traces.?
?
| Radio |
Band |
Avg. |
? |
| ? |
160 |
80 |
40 |
30 |
20 |
17 |
15 |
12 |
10 |
6 |
? |
? |
| QMX+ |
5 |
5.2 |
4.6 |
4.3 |
3.7 |
2.5 |
4.5 |
3.3 |
3.5 |
0.9 |
3.8 |
Original BS170s |
| QMX+ |
4.5 |
5.9 |
4.4 |
4 |
2.3 |
1.7 |
2.5 |
1.5 |
1.5 |
0.5 |
2.9 |
With FDT86256 PA Mod |
| QMX+ |
5.4 |
6 |
4.7 |
5 |
2.8 |
2.2 |
4.7 |
3.6 |
2.6 |
0.8 |
3.8 |
Back to BS170s (new set) |
--
Randy, N4OPI
