-40%
J310 push-pull HF pre-amp KIT BUILT & TESTED 0.03-30 MHZ
$ 22.25
- Description
- Size Guide
Description
<div style="text-align:center"><img src="http://ti2.auctiva.com/sw/java.gif" border="0"><br><table align="center"><tbody><tr><td><a style="text-decoration:none" href="http://store.auctiva.com/gr_makis"><img src="http://ti2.auctiva.com/sw/images.gif" border="0"></a></td><td height="27px" valign="middle" align="center"><font face="arial" size="2"><b><a href="http://store.auctiva.com/gr_makis">gr_makis</a> Store</b></font></td></tr></tbody></table></div>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.
New ears for your HF receiver
The design is successfully tested with around 15 dB gain from 0.5 to 30 MHZ and still has 8-10 dB gain on more than 55MHZ.
The outupt P1dB is +15dBm and it's noise figure is around 3 dB.
This amplifier can be used as a low-noise pre-amplifier in receivers or as general purpose wideband gain stage.
The two J310 J-Fets are biased at about 20mA each. The input transformer T1splits the input signal to feed both of the J-FETS in a balanced configuration, while T2 adds the two amplified signal together. This technique improves the 2nd order performance significantly, since all even harmonics cancel out. R1 and L1 form a negative feedback which affects amplifier's gain and frequency response.
The PCB dimensions are 71 x 25mm.
The RF connectors are SMA sockets (female) and the DC power connector is an MTA 3.96mm 2-pin plug (mating cable socket is supplied).
This listing is for one fully built and tested pre-amplifier module.
The item (1 pre-amp module as pictured) will be shipped with Registered priority air mail or with FedEx, as you can choose when ordering.
You can download its schematic from our website sv1afn
User Comments:
Hello
I just want to let you know how pleased I am with your preamp that you modified for the LF bands. It works very well, very clean with no images. The previous preamp I was using was a Hewlett Packard and it created a lot of images down the band. I am able to receive LW stations from Europe and I live 1500km from the Canadian coast. Very impressive preamp.
Terry VE3XTM
Guelph ON
Canada
.
Check out my
other items
! I always combine shipping.
This pre-amplifier module is also offered as a DIY KIT, see it here:
https://www.ebay.com/itm/J310-push-pull-HF-pre-amp-complete-DIY-KIT-0-03-30-MHZ-SV1AFN-shop/201976974906?hash=item2f06c40e3a:g:368AAOSwM5JZpBgm