Is the Panasonic FC suitable for this circuit?

[Zeroexpo]

Hi Guys,

I'm almost finished building a PLL Transmitter, but wanted to pose a question to the experts here before continuing with the build.

I used Panasonic NHG general purpose Capacitors everywhere where Electrolytics needed to be fitted, but for C68, C69, and C70 in the area I'm pointing at with the pen, I'm thinking about using some Panasonic FC as these are the only Cap's I have left; I believe they're low ESR.

I also plan on using one in parallel with the output of a 7805 regulator, as I believe low ESR are ideal for power supply applications - but I might be wrong. Can anyone confirm?

So, are the FC series suitable in these parts of the circuit, or shall I just order some more NHG or alternative general purposes Cap's?

What's the worst that can happen?

Many thanks in advance.

[brethin]

Re: Is the Panasonic FC suitable for this circuit?

The FC are better than the NHG so as long as the lower ESR isn't a issue in your circuit you should be fine. I see nothing that should be a issue with the lower ESR based on the provided schematic. Others may see something I don't so please get other opinions.

[selldoor]

Re: Is the Panasonic FC suitable for this circuit?

I think you will be ok with the FC they are not particularly low esr just better than a GP cap. Worst that can happen - you have to replace them later if someone comes up with a definite reason for not using them.

If you can find a datasheet for the IC they are nearest to it may say on it that the caps should
be or not be low esr.

[Zeroexpo]

Re: Is the Panasonic FC suitable for this circuit?

Thanks for the replies Guys.

I've posted another image of the schematic, and although the quality of my camera phone isn't too good you can still make everything out.

Again, the pen is pointing to the area in which I'm planning on using these low ESR Panasonic FC Cap's - and the IC's that they're mostly connected to are IC4 which is a 74ALS74, and IC5 which is a 74HC4059E; A CMOS flip flop and CMOS divide by counter respectively.

The Capacitors are in close proximity to transistors, and one of them looks like it's sole purpose is for timing as it's connected between the base and emitter of TR13.

[budm]

Re: Is the Panasonic FC suitable for this circuit?

Is there a place I can download the diagram/manual of what you posted?

[Zeroexpo]

Re: Is the Panasonic FC suitable for this circuit?

Is there a place I can download the diagram/manual of what you posted?

Hi mate,

The documentation, schematic, and build instructions are here under "PLL Pro 3", the 4th link down (16MB) as far as I'm aware - http://www.gareth.net.nz/nrgdocs/

There is actually a part kit available on eBay UK as we speak, and that's where I've bought mine from.

If you have no success at the site above, just PM me and I'll send a scan of my build instructions, etc'.. via eMail.

[budm]

Re: Is the Panasonic FC suitable for this circuit?

Thanks for the link, I just want to see how it works.

[Zeroexpo]

Re: Is the Panasonic FC suitable for this circuit?

I'm about to finish building my 2nd one, and have just commenced building a Pro IV latest version this evening - I'm about 50% into the build.
These NRG kits have a good following in the Pirate Radio scene, albeit they're quite large.
I was going to put one on air for an hour or two, but always bottle it - and instead use it into a dummy load as an "all house" transmitter.