[Amps] SS Amps are expensive...why?

[Martin Sole]

That's a good breakdown, I hadn't realised, until I re-read the website, 
that the PSU is INCLUDED! Really is quite a good deal. A 1500 watt, RTTY 
contest capable amp for a bit over US$3k. A Pi, fans and some coax is 
nothing in that picture, lack of full break-in seems a minimal loss in 
exchange for all the rest.

Someone mentioned it weighs about 49lb (22kg)

What about dimensions (HxWxD)?

Martin, HS0ZED




On 26/01/2019 08:43, Jim Thomson wrote:
> Date: Fri, 25 Jan 2019 17:13:26 -0500
> From: charlie carroll <k1xx at k1xx.com>
> To: amps at contesting.com
> Subject: Re: [Amps] SS Amps are expensive...why?
>
> <The correct link for the current B26 amplifier kit is
> <   http://rf-kit.de/en/2k_Kit.php
>
> ##This is the correct home page.
>
> ##  The amp is 95% assembled.  The end user supplies and
> installs the pair of  120mm  fans....and the  single 80mm  fan.
> The pair of 120mm  fans are in push pull.  The 80mm fan is used to
> cool the LPF assy..and also the optional auto tuner.
>
> ##  7 LPFs  used to cover  160-6m.  They are all 2+ kw rated.
> The optional auto tuner covers  160-6m, also 2+ kw rated.
>
> ## end user also has to supply the raspberry pi  processor..
> and also assemble some interconnecting cables.
>
> ##  amp comes with a pair of  BLF  189XRAs in push pull.    Each
> 189 is a pair of transistors on one die.  Each pair is paralleled
> to make one big transistor.   EACH 189 assy is rated for 1.5 kw.
> So 2 of em in push pull, run at  1.5 to 2 kw is conservative.
>
> ##  choice of 3,  13 or  16 db @  100  watt input pad.
>
> ##  reinhard already  tried  NFB..which bought him nothing, and no improvement in IMD redux,
> so  no NFB used.    No alc used either.   This amp will not operate  QSK, without some modifications.
> ## Includes the  3 kw CCS  switching power supply.   Reinhard also tried a diplexer, which also resulted
> in no net benefit, so no diplexer used.   Flex uses a diplexer, which consists  of a mating HP filter for each LPF.
> Harmonics are then  routed  via the  HPF  to a 400 watt  dummy  in the case of the flex....power genius.
>
> ##  reinhard tells me the B26 amp  operates at  typ  72% eff.  Others have done detailed IMD tests with this
> amp at 1.5 kw..and its fairly good.   Still others have beat on it  for an entire weekend of   rtty contesting.
> Others have beat on it with FT-8 and other data modes.   Others have used it on AM.  Processed  ssb is
> a non issue too.  Ditto with cw.
>
> ##  Its a quiet amp.   The heat sink design is superb, bar none.   As far as  SS  high power amps go, its a bargain.
> ##  one input... but four switchable  outputs.  I believe it also has an output for  ..pure signal..for the  ANAN  xcvrs.
>
> ##Once  ..pure signal.... starts to be used by   icom, kenwood, yaesu,  etc, or their version of it.... IMD  will be a thing of the past.
> ##  I have seen the results of an ANAN  8000  used with a OM-4000  running full bore....and all the IMD products are through the floor,
> they are all down –70 db....   sorta like a brick wall  filter on RX.      Others have played with bias settings and idle current settings, and
> now you can reduce the idle current on a GG tube amp even more..and with PS engaged,  IMD is still through the floor.
>
> ##  Just to recap, they only make just the one product, the B26  RF-2K+  amp.    They will be in orlando in Feb..and  dayton in may.
> The prices I was quoted are in euros, so u have to do your own  conversion.   Below is the price quote I got 3 months ago.
>
> We do sell the Kit in two versions:
>
>
>
> Pricing:
>
>
>
> -             RF2K+ Kit without Tuner                              2550,-€
>
> -             RF2K+ Kit with Tuner                                   2850,-€
>
> -             13dB;16dB or 3dB attenuator                        22,-€
>
> -             Shipment to Canada                                      190,-€
>
>
>
>
>
> Today's order will be delivered in October 2018.
>
> All new shipment will be with the brand new BLF189XRA.
>
> To complete the KIT you need a Rasperry Pi3; 2x120mm fan and 1x80mm fan.
>
> Cost for the additional needed components is about 80,-€.
>
> Finishing the Kit takes just a few hr.’s as everything is already installed in the housing.
>
>
>
> ##  Hope this helps a bit.
>
>
>
> Jim    VE7RF
>
>
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps