modified rdw

[radium98]

anyone know the original of this ,an advanced that have temp,swr and pwr reading and deviation meter ,in one pic micro controller ,i have never seen that pll before

[Albert H]

That looks like a lot of work to get 4 Watts at best.

I'd use the oscillator and buffer stages to drive a pair of BFG135 for about 500mW and then stick an RD15HVF on the end for 10 - 15 Watts out easily.

[teckniqs]

Why the need for two 4427's?

[RF-Head]

This is not a RDVV
The RF part is a old $w design from me and the original design use normal PLL with 4059 etc
this was a project of a guy "martin"but never completed
He made a design using my RF stage and the PLL part of the RDVV

[RF-Head]

The second 2N4427 was for power adj
In the day we had 1000s of them
Now i wish that i still had them

[teckniqs]

I know it's not the same, but it reminds me of this...

[Albert H]

Teckniqs - where did you find that? It's very familiar! That reminds me a lot of a board in a box that came from a guy that I know very well.

[teckniqs]

Someone I used to be in contact with built it. I don't know where they got the design from and I'm no longer in contact with them to find out.

[rigmo]

http://www.3-mtr.info/shareware/Paradis ... 20Blikje)/

[Albert H]

Someone I used to be in contact with built it. I don't know where they got the design from and I'm no longer in contact with them to find out.

That's a shame, because one of the guys that works for me used to supply little boxed exciters just like that. He had problems with the PLL in them, so I redesigned it for him, and even did a new PCB layout for him. We used some of the improved version of that exciter in some of the gear that we supplied in the late 80s, and early 90s.