1.8 MHZ High-Pass Filter - 11-th order - 1500 W- FedEx Fast Ship - SV1AFN shop

Description

ATTENTION:
The price shown
includes Greek VAT 24%
and is applicable to
all individuals in EU countries only
.
If you are from any other country including USA, Canada, Australia etc. please use the "make offer" button and divide the price by 1,24.
We will first accept this offer to let you proceed with the check-out and payment.
If you are a business registered in EU with a valid VAT number again, you can use the same button so to pay without VAT. We will send you a zero VAT tax invoice.
1.8 MHZ High-Pass Filter
This design is a 11th order Chebyshev high-pass filter with very low ripple.
It is offered in two variations, one low-power, for receive only applications and another capable of withstanding high power, i.e., capable to pass high power on all HF bands including 50 MHZ without the need to put it out of the line when transmitting up to 1000-1500 W or more. The damage level is 2100W.
A special enclosure, for each of the two variations, is also available and both PCBs are designed with those enclosures in mind.
There is no something high-tech on these filters, only, because many friends of mine were not satisfied from the performance of commercial low cost similar filters, asked me to develop a better one with more elements to give rapid attenuation of the MW BC band of 550 - 1600 KHZ, while to perform transparently on all of the rest of the HF spectrum with minimum loss. I have started the design thinking to sacrifice the 1.8 - 2.0 MHZ amateur band (or, at least don't care about this band) because I didn't know how to get minimal loss on 160 m and deep attenuation on the area of 550 - 1600 KHZ at the same time. One solution was to use an elliptic design which provides rapid attenuation curve but only up to around -40 dB minimum attenuation of the rejected band so to be practical and easily reproducible at home,  and another solution was to use high-order and  carefully selected good components with the Chebyshev coefficients. With the chosen topology, an attenuation curve of around 10 dB per 100 KHZ has been achieved, -16 dBc on 1600 KHZ, (-20 for some prototypes),  --26 dBc on 1500 KHZ,  - 37 dBc on 1400... <-100 dBc under 800 KHZ and even more on 550 KHZ., while its maximum loss over the 1.8 to 54 MHZ range is on the middle of the 160m band with 0.4 dB, which is quite acceptable at lower power levels.
See more info at www.sv1afn.com under projects or directly to
https://www.sv1afn.com/1m8highpassfilter.html
(copy and paste to your browser to work).
ORDERING OPTIONS - Prices include 24% VAT
If you have a valid EU VAT number please email us for issuing a VAT exception invoice.
For a complete Built & Tested and Boxed Unit (USD 190.00)
RF capacitors of high voltage are used for all the circuits which are factory soldered.
The shipping is with FedEx or DHL
Check out our
other items
! We always combine shipping.
The inexpensive Receive-only version is also available here:
http://www.ebay.com/itm/AM-MW-broadcast-band-reject-filter-1-8-MHZ-high-pass-11th-order-with-enclosure-/152546538188?ssPageName=STRK:MESE:IT