Hmmm. I don't see any specs at all, only one plot of response to a
filter centered on 7078 kHz, with a very broad frequency scale, nothing
to indicate the degree of attenuation at close spacing. No BFF
responses. Nothing in the sales page either. Lotta stuff in the box, so
it looks to be a bit of a bargain. BUT -- I suspect Pin One Problems --
they sell an interface that "provides galvanic isolation," rather than
recommending bonding all equipment chassis together. Also, they say not
to power from the rig supply. All of that sets off an alarm.
73, Jim K9YC
On Thu,9/15/2016 1:22 PM, rick@dj0ip.de wrote:
You give up too easily, Bob.
Here you will find schematic, bandpass curves, everything your little heart
desires! (hi)
https://herostechnology.co.uk/pdf/SCR_Preselector_CAT_User_manual_web.pdf
The price is just under 600 GBP or about $800 (700 EUR).
That actually looks pretty good to me!
73 - Rick, DJ0IP
(Nr. Frankfurt, Germany)
-----Original Message-----
From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Katz Ajamas
Sent: Thursday, September 15, 2016 5:43 PM
To: Discussion of Ten-Tec Equipment
Subject: [TenTec] Preselector, was: Re: Scads of used Icom IC-7300
I am thinking about a home brew tracking preselector and started looking for
other examples. Then I start to read that the Flex guys appear to be needing
a preselector too! A bit of a surprise. Then I see there is one!
https://herostechnology.co.uk/pages/SCR_Preselector.html
Alas, no schematics so no chance to pick their brains without buying one.
This I will not understand. If someone is going to copy your product, they
will not be deterred by lack of a schematic. They will just buy one and see
how it is built.For the purchaser who is comparing products or the home brew
guy... well, I am reluctant to purchase anything that is not well documents.
I am still a bit pissed off with Tentec for not releasing up to date Eagle
documents.
73, -Bob ah7i/w4
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