On 2021-05-08 05:49, n2msqrp wrote:
These capacitors have a X7R dielectric. I would look for capacitors
with a NPO dielectric
Does the temp coefficient matter? This isn't a VFO. I just looked it up -
X7R is considered relatively temperature stable. I found a graph - the capacitance peaks around 20C, and at 0C and 40C it will be down 1% to 2%.
For a lowpass filter, that should be just fine. I would worry more about voltage rating, AC current rating, and ESR (Equivalent Series Resistance).
- Jerry KF6VB
Which have a better temperature coefficient.
Mike N2MS
On 05/08/2021 5:17 AM Gerard <kabupos@...> wrote:
Hello,
On eBay I found this Italian retailer that seems interesting to me
for SMD's on filnal filters power.
it's Telstoreit Telstore Shop | Boutiques eBay [1]
I find that his SMD's are not very expensive and necessarily it is
convenient for delivery in France. I have 4 choices for the
capacitors at the output of the power amplifier filter. (Example for
100pf)
What would be your choice, knowing that an option for 2 euros more
allows to make stock. ( i also have others things to order, global
ship port 9.9 € )
10 pieces 4.29 €
Datasheet
10 pieces 4.46 €
Datasheet
10 pieces 3.84 €
Datasheet
50 pieces 6.82 €
--->> Give me stock!!!
Datasheet
cdt
Links:
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[1]
[2] /g/BITX20/message/88207
[3] /mt/82546658/243852
[4] /g/BITX20/post
[5] /g/BITX20/editsub/243852
[6] /g/BITX20/leave/10189903/243852/952924773/xyzzy
