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[N3VET]

need help finding info on this amp   i purchased a hamfest   here is what it says on the front
 2 in 50 out hf amp with 817 auto band ..  it is a black case  with a power switch  rev/fwd toggle switch and a cor/ptt togle switch ..  817/ manual toggle switch  and a  control knob  led green lights  80, 40, 20/30 15/17 10/12 
across the top on the right  says meter and  s roe of red led lights ..  no meters .. top left on green led  xmit
   the guy says it is a hardrock v 2   , i cannot find any think on it..  ( how to use it) 
 oh!! on the back has  2  bnc jacks for input and output  and  2 phono jacks  ptt and 817
any help please
thanks Bruce

 

[WD5GWY]

I have a Hardrock 50 amplifier.  Never heard of a version 2.
Here's a link to their website.
https://www.hobbypcb.com/index.php/products/hf-radio/hardrock-50-hf-power-amp



James
WD5GWY

[G4AON]

From the description, the amp sounds like a generic Chinese amp. I have a Hardrock 50, it has an LCD screen and push buttons, nothing like the OPs amp.

73 Dave

[N1IG]

I've recently seen one ad on QRZ referring to that version:

https://forums.qrz.com/index.php?threads/ft-5d-z-817-hardrock-amp-and-more.848852/

Maybe contact the seller and see if they can provide some info on it.

[G4AON]

This advert has an image and mentions Hardrock 50 ver 2. The box in the photo doesn’t have that printed on it.

The one in this link is not a Hardrock 50.

https://www.swap.qth.com/view_photo.php?counter=1623160

73 Dave

[N7EKU]

Hi Bruce,

The PTT/COR (carrier operated relay) switch triggers the amp either by the PTT line on the back, or by detecting RF on the input.

The 817/manual switch would select the low pass filter either by the 817 band select cable going to a Yaesu FT-817, or by the knob on the front.

The rev/fwd toggle would select the row of LED's to show either the forward relative power output, or the reverse power which should not light up many unless the SWR is bad.

Some of these amps can be easily burned out if more than the rated input is fed to them, so I would keep that to 2W or under.

A look under the cover may give more info via printing on the PCB's.  It would be good to see what the finals are too.

73,  Mark