[Elecraft] OT - American hamming in UK

Fri Nov 30 15:04:02 EST 2007

Doug Faunt N6TQS +1-510-655-8604 wrote:
> Well, I see that David says it's quiet at RF-
>       "Its very small, quiet - both physical and appears to be on RF too"
>
> I only see a 14A PS from Jetstream that's the same size- is that what
> you tested?
>   

Yes, that's the one.  A friend bought one and brought it by.  I've not 
asked him how it is doing.  He planned on using it to power a 2m rig and 
at VHF I could see no hash.

Hopefully the mfg did put more filtering in the 20A version, and the 14A 
version is probably OK with added filters, but the stock one did not 
look good.

Another friend brought by a RS 3A switcher that he was using to power 
his K2 until he found the source of his noise.  Since then he has used 
it only as a battery charger.  That one and the 14A Jetstream looked 
equally bad.

73 de dave
ab9ca

> And since W&S rebranded it, they may have changed other
> characteristics, too.
>
> It'd be interesting to see how the W&S unit did on a test bench, since
> it does look attractive.
>
> I've had reliability problems with the MFJ-4125, although the unit appears
> to be robust now, after two trips to MFJ, and some rework by myself.
> But I tend to work it hard, DXpedition and contest RTTY.
>
> BTW, I have found that not all equipment is more expensive in the UK.
> I have a TH-D7E that was cheaper in the UK (and had bandpass filters
> for the 430-440 satellite band, instead of 440-450).
> You just have to shop carefully.
>
> 73, doug
> M0BPI at times
>
>    Date: Fri, 30 Nov 2007 11:36:30 -0600
>    From: dave <hottell at gulftel.com>
>
>    I'd be interested in hearing if that unit has RFI problems.  I had one 
>    that looked identical to that, with the brand "Jetstream" on it, on a 
>    spectrum analyzer a day or two ago.  Appeared to produce lots of RF 
>    hash.  Might be OK across a battery, but looked really bad by itself 
>    (hash at -80 dBm or so).  The hash was riding the power cord as well as 
>    the output terminals.  Did not do a through check, not enough time, just 
>    a quick look.
>
>
>    Doug Faunt N6TQS +1-510-655-8604 wrote:
>    > It's about the same size at the MFJ-4125, and W&S may have a better
>    > reputation than MFJ.
>    > It does look like a nice piece of kit, but what kind of warranty
>    > coverage does W&S give to non-resident purchasers?
>    >
>    > The price is very good, in fact, especially if W&S will do the required
>    > paper work for a VAT refund.
>    >
>    > 73, doug
>    >
>    >    Date: Fri, 30 Nov 2007 10:58:35 +0000
>    >    From: "David Ferrington, M0XDF" <M0XDF at Alphadene.co.uk>
>    >
>    >    On the PSU - why not buy one here (I guess exchange rate might be an issue),
>    >    I'm using a Watson Power-Mite, purchased from Walters & Stanton (Watson is
>    >    their kit)
>    >
>    >    http://www.wsplc.com/acatalog/Watson_Mains_Power_Supplies.html
>    >    should be the first item on that page
>    >
>    >    Its very small, quiet - both physical and appears to be on RF too
>    >    Has switchable input voltage, so when you take it back it will work - it
>    >    should work in any country I would have thought.
>    >    A few nice features:
>    >    * uses a standard power cord with 'normal' PC style 3 pin - just take the
>    >    right cord for the country (anyone know right code for that kind of plug).
>    >
>    >    * fan can run in auto mode or permanent on, it didn't come on much when I
>    >    used it with my FT-857 in the summer.
>    >
>    >    * short-circuit and  over-voltage protection
>    >
>    >    * adjustable voltage, so if you don't really need another supply at home,
>    >    use it on the bench etc.
>    >
>    >    since you're staying with family, have it delivered to them or get them to
>    >    purchase for you, W&S have a shop in the Midlands and Scotland too.
>    >
>    >
>    >    I haven't used the Alinco one, but it has an adjustment to compensate for
>    >    the RF it produces.
>    >
>    >
>    >    On 30/11/07 03:00, "Mike Geddes" <geddes at tampabay.rr.com> sent:
>    >
>    >     2) Suggestions for a nice portable 20a
>    >    > switching power supply?  I am looking for a smaller unit I can include in
>    >    > the case with the radio. And it must have 110/220v power options.  I saw an
>    >    > Alinco that seemed to fit the bill. I welcome your ideas.
>    >
>    >    -- 
>    >    All the world's a stage and most of us are desperately unrehearsed.
>    >    -Sean O'Casey, playwright (1880-1964)
>    >
>    >
>    >
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