thewoodstarr wrote:

Analyser wrote:

teckniqs wrote:Maybe check it on an analyser then? Are you that guy they call 'Woody' who doesn't put any filtering in his rigs?

....That makes sense.

Unfortunately, this is correct. I've never seen a W***y rig but I was asked to repair a B1 link box of his a couple of years ago, and it was about the worst thing I've ever seen. It was supposed to be 20w and it was doing about 2w on B1 and 14w in the aircraft band. Matching was roughly tuned for B2 and no output filtering.
Alongside that the PLL was conpletely unstable and the audio coupled in to the oscillator with a 10nF capacitor. I couldn't work out at the time if that was done on purpose to try and stabilise the PLL but in the end I decided that would be far too clever of the builder. It was just like someone soldered random components into a box. Plus I got a shock off it because the mains live was brought to the front of the case and switched using one of those tiny Maplins micro toggle switches. The station who brought it to me paid a lot for it (I'd rather not say how much) and were told it was the best out there.

Mr "woodstarr", I'm not intending to slag you off for fun (you might be a really nice fella) but the equipment I saw was really really bad, you've still got a lot to learn about electronics and RF and letting stuff like that out of your workshop is not doing the scene any good. You might be selling 100s of rigs to big name stations but that doesn't make the equipment good. You have to remember that stations just put these things up on an aerial and have no test equipment to check them. If you keep on making stuff that broadcasts in the aircraft band you're going to end up in jail pretty quick.[/quo


Ok well wasn't one of mine, I did not make band one equipment. Always Microwave. You said the audio was coupled to the Oscillator with a 10nF? Hmm I am sure your a very nice guy, but how would that work full stop? So this device never worked? Do you mean 10 uF? Look it was nothing to do with me me, I never made band one equipment?

thewoodstarr wrote: Ok well wasn't one of mine, I did not make band one equipment. Always Microwave. You said the audio was coupled to the Oscillator with a 10nF? Hmm I am sure your a very nice guy, but how would that work full stop? So this device never worked? Do you mean 10 uF? Look it was nothing to do with me me, I never made band one equipment?

thewoodstarr wrote:My dummy Load cost £300 Mate! Mind you it is supposed to do 300 Watts continuous, in its friggin dreams! Oh well....

SOTS 87 7 wrote:

LAZY wrote:Nicely done Sots. Do you have any pics of the finnished amp? What values did you use for the LPF, number of coils, Dia Etc?

Lazy

Hi Mr. Lazy, it is installed in a rack mount case and in use, lol, I will certainly try and upload some pics of the innards when I get a mo.
Amazingly this little amp when mounted on a decent heatsink doesn't even get hot. I recon the Chinese got that one right for a change. Feeding in Aprox 2 watts, with 98.7 watts out into a 50 ohm load at 87.7Mhz. Not bad at all.

teckniqs wrote:It is nicely built, the SMT soldering looks like it was done on a flow-solder machine?

teckniqs wrote:It is nicely built, the SMT soldering looks like it was done on a flow-solder machine?

3M amateur wrote:

SOTS 87 7 wrote:

LAZY wrote:Nicely done Sots. Do you have any pics of the finnished amp? What values did you use for the LPF, number of coils, Dia Etc?

Lazy

Hi Mr. Lazy, it is installed in a rack mount case and in use, lol, I will certainly try and upload some pics of the innards when I get a mo.
Amazingly this little amp when mounted on a decent heatsink doesn't even get hot. I recon the Chinese got that one right for a change. Feeding in Aprox 2 watts, with 98.7 watts out into a 50 ohm load at 87.7Mhz. Not bad at all.

Hi SOTS, I have a question about the coils you have made for this amplifier. Is it 4T on the first and 6T on the midle and 4T on the last coil.