Whites Surf PI schematic

[peyman 74]

hi
what is the best coil for surf pi؟ and specifications?

[bernte_one]

49 Pages and more Infos included in this Thread as in the whole world wide Web an you can't find an Info Here? See some Lines above there is the field 'search this Thread' try this an Type the Word coil there.

[plinio]

why should it be used stacked polyester film capacitors on Surf pi??

[kt315]

do we have to open new thread where we will teach everybody by simplest basic electronics? who will pay our job in internet?

[plinio]

the boss of all the boring ones

[kt315]

yes

https://en.wikipedia.org/wiki/Film_capacitor

[plinio]

the God of all the boring ones

[kt315]

the god is just did a try to save us from the Degradation. unsuccessful attempt. the Mind value is sure decreased, not increased.

[plinio]

many thanks mate!
btw i don't belive in anyone who married Louise Veronica Ciccone

[Andi68]

Then do your thing without help

[plinio]

then close this forum, Mr. Sympathy

[plinio]

on Surfmaster Pi schematic C5, C6, C7= stacked
on Surf Pi C5, C6, C7= NO stacked
LOL!!!

[kt315]

lol for what? stacked is modern tech and no more than. gives compact size. and what? what give you this knowledge?
more cigarettes today? leave it out and do your home work, student.

[Carl-NC]

I sure wish people could either reply without the snarky attitude, or simply not reply at all.

Plinio, it is typical to use high-quality poly caps (typically PP or PPS) in demodulators because they have better temp stability, less dissipation, and lower microphonic effect. This is especially critical in a VLF design where demod errors result in phase errors that affect target ID. In a simple SMPI-type PI design it is not so critical because all we're looking for is fast relative changes in the demod signal. So for the SMPI, even a ceramic cap will work pretty well.

[dbanner]

Plinio, you have made a good observation about the different style capacitors. This is the first step in circuit design, one must use appropriate type of capacitors for the task at hand.
The following articles may help to see the vageries of capacitors. There are many articles on capacitors contained in old hobby magazines which are quite informative. I have found some very good ones. I'll try to post as many as I can.