boys and girls,
I’ve been selling the “AmpKeyer” for the last ten years or so.
The AmpKeyer uses either (or both) mosfet and relay. The switch time for the
relay is 5ms
2ms for the mosfet.
It will switch positive or negative keylines. Voltage to 450Vdc and up to 6 A
of current. The relay will handle 300 Vdc at 1.5A.
now, having said that, because Ten Tec use to be in the small enclosure
business, they made the cases for me.
They have decided to drop that part of the company.
So, that forced me to redesign the circuit so when (IF!) I can locate a source
to make boxes, I’ll be selling them again.
I made several pcbs with the new layout, and while there are a few bugs, they
are prototypes, they work fine.
if anyone is interested, they are $10 a board plus shipping. Contact me off
list.
as with all my boards, they are double sided plated through holes with solder
mask and silkscreen
Mike Bryce wb8vge
prosolar@sssnet.com
On Jul 27, 2014, at 12:21 PM, Rick - DJ0IP / NJ0IP <Rick@DJ0IP.de> wrote:
> John,
>
>
>
> A couple of questions:
>
> 1. Do you plan to work CW or only SSB?
>
> 2. If CW, will you use it with your Hercules or some other amplifier?
>
> 3. If another amplifier, which make and model (due to relay switching
> timing)?
>
>
>
> There are several so called "soft key" solutions on the market.
>
> Some sell them, others (AD5X) suggest ways of home-brewing.
>
> Basically what these do is use a big hefty transistor to switch the amp.
>
> That way there is no danger of blowing the Eagle's internal open collector
> switching transistor.
>
>
>
> However unlike the Orion or Omni VII, the Eagle has no post-dit delay or
> "hang" delay.
>
> So if you try to key an Ameritron amp without the optional QSK switch, all
> hell breaks loose inside the amp.
>
> In that case it is best to buy the Model 318 Amp Keyer.
>
> But it uses a relay so it does add about 3ms delay to the switching time of
> the amp.
>
> I threw that relay out and just used the built-in open collector transistor
> of the 318 to switch Ameritron amp. but with the added advantage that I got
> adjustable hang time. Now it is nice and silent.
>
>
>
> However I doubt there is time enough to sort this before you operations next
> week.
>
>
>
> If you're interested in my mods to the 318, it is on my web, here:
>
> http://www.dj0ip.de/downloads/
>
> (It is file no. 4 on that page.)
>
>
>
> 73 - Rick, DJ0IP
>
> (Nr. Frankfurt am Main)
>
>
>
>
>
> -----Original Message-----
> From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of John Farler
> Sent: Friday, July 25, 2014 5:10 PM
> To: tentec@contesting.com
> Subject: [TenTec] A real post and question
>
>
>
> OK kids - (I used to be a school principal) Let's quit the arguing about
> how many angels will fit on a pin, and make this the civil discourse it
> should be, especially with all the good tech's here. John Henry has taken
> on the SW project, and I dont care too much about lab comparisons, which, in
> my view, have Gone to an absurb level that will not probably be noiced on
> the air.
>
>
>
> My problem is that I will ACTUALLY BE OPERATING during the KY WEEK COMING UP
> TUE AS A W1AW/4 CENTENNIAL STATION. I have my regular station and SW setup
> (Omn 6+ and Hercules II.) I took the TT deal and got an Eagle, which just
> came in and I haven't had a chance to even hook it up. If I learn enough,
> I'd like to get it on the air some.
>
>
>
> I know it will switch SOME linears through the accessory jack, but would
> like more isolation and more current head room on the switching lead,
> without losing the necessary delay. I'm thinking the circuit might not be
> very complicated. Question is: Has anyone made such a gadget, or should I
> just get the TT Accessory?
>
> Thanks,
>
> 73,
>
> John, K4AVX
>
> _______________________________________________
>
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>
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>
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>
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