Help identify value of Capacitors

[chuubaba]

Whats the value of highlighted capacitor in centre of the picture. Its from sticky post TGSL - complete details - version 3.0

[kt315]

15nF. 22nF.

[chuubaba]

Also the value of these two capacitor highlighted in Blue is written as 10 but the BOM only has one 10pf capacitor and even then how am i going to find polarity of it

[chuubaba]

kt315 thank you for your attention. Please specify the value of the capacitor highlighted in yellow sandwiched between 4k7 and 470k resistors. Is this 15nf or 22nf ??

15nF. 22nF.

[dbanner]

[ATTACH]43441[/ATTACH] Also the value of these two capacitor highlighted in Blue is written as 10 but the BOM only has one 10pf capacitor and even then how am i going to find polarity of it

In the original schematic, it is non-polarized capacitor. Since these types of capacitors are more difficult to find laying around, you can substitute by placing two polarized electrolytic caps in series with the two negative terminals connected, as shown on layout. Just remember that the same value can be obtained by using two same value caps divided by two. So two 10uf caps connected this way would be equal to 5uF

[kt315]

kt315 thank you for your attention. Please specify the value of the capacitor highlighted in yellow sandwiched between 4k7 and 470k resistors. Is this 15nf or 22nf ??

15nF on input of RX preamp. 22nF in feedback. look on the schematic.

[chuubaba]

So I should take two polarized 10uf capacitors and join their negative terminals with each other and this will do the job Right ?? I have two 10uf 25V polarized capacitors

In the original schematic, it is non-polarized capacitor. Since these types of capacitors are more difficult to find laying around, you can substitute by placing two polarized electrolytic caps in series with the two negative terminals connected, as shown on layout. Just remember that the same value can be obtained by using two same value caps divided by two. So two 10uf caps connected this way would be equal to 5uF

[rickb]

Low value caps are generally polystyrene or ceramic and are non polar.

[chuubaba]

How to meet this requirement. Next i can see two 220nf polarized caps and I only got these in ceramic with capacitance code as 224

Low value caps are generally polystyrene or ceramic and are non polar.

[dbanner]

Have a look at the schematic. It has two 10uF electrolytic caps connected with the negative terminals back to back, giving the required 4.7uF n.p(non polarized)

[dbanner]

As you should know, especially if you intend to construct your own projects, how to identify components types etc., And how to read schematic diagrams. Just the basics.
Polarized caps, as the name implies, have a positive and a negative end.
The 0.22(220nf) are regular polystyrene caps.

[dbanner]

When it comes to capacitors, they are application specific, that is to say the different types are so designed to give them special purpose applications, depending on what is required.
Electrolytic, tantalum, ceramic, polystyrene,etc,etc. All have unique characteristics.
So you should be careful which type of cap the schematic recommend.

[dbanner]

A good components/parts list should specify the type that is required for each component.

[dbanner]

Above I mistakenly said I have never seen 220nf ceramic disc, what I meant was I have never seen 220uF ceramic disc caps.
They would be very, very large.

[rickb]

The 0.22(220nf) are regular polystyrene caps.

Probably polyester.