[TenTec] OT: Heathkit HA14 measurements?

Fri Mar 4 16:59:11 EST 2005

Mike,

Thanks for the description.  Sounds great.

I already found one about a year ago.  I bought it and had it shipped to my
mom's house where it has been sitting in storage ever since.  Next week I
will fly over for a visit and then plan to hand-carry the amp back to
Germany.  I also have the HP-24, but didn't get the HP-14.  I don't plan any
mobile operations with it.

I run openwire fed antennas here, so I have to tune a matchbox each time I
change bands.  However I do get a perfect match on all bands.  I really like
the simple tune up of the HA-14 because tuning both a matchbox and an amp
can be a pain.

I'll carry the amp in my hand baggage and the P.S. will go in the check-in
baggage.  It sounds like the amp is about the size of two laptops stacked on
top of each other.  I have several computer bags, so I'll check the
measurements and be to take a bag that it can fit in.

Thanks again for your help.

73
Rick

-----Original Message-----
From: tentec-bounces at contesting.com [mailto:tentec-bounces at contesting.com]
On Behalf Of Tim Soxman
Sent: Friday, March 04, 2005 11:29 AM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] OT: Heathkit HA14 measurements?

Heathkit HA-14 SSB Linear Amplifier

The amplifier is 12-13/16" wide x 3-3/16" high x 10" deep.
Band Coverage is 80, 40, 20, 15, and 10 meters.
Power input SSB: 1000 watts P.E.P.
Driving power up 100 watts for full output.
Output Impedance 50 ohms unbalanced, SWR not to exceed 2:1.
Input Impedance 52 ohms unbalanced; broad-band pretuned input (circuit 
requires no tuning)
Meter Functions Relative power and 1:1 to 3:1 SWR.
Front Panel Controls Tune: 80, 40, 20, 15, and 10 meters.
Band 80, 40, 20, 15, and 10 meters.
Relative Power Sensitivity control.
Meter switch: FWD And SWR.
Power switch: OFF, ON.
Tube Complement Two 572-B (or two T160-L) in parallel.
Power Requirements 2000 volts DC at 500 ma and -120 volts DC at 60 ma, 
an 12.6 Volts Dc at 4 amperes.
Net Weight 7 Lbs.

Now lets get to how well it operates, In the real world, it will run 500 
watts output useing a Bird model 43 watt meter. I have only checked it on
80, 40, and 20 meters, but i am sure it will be a little less on 15, and 
10 meters. There is no standby position so you can not use your exciter
barefoot unless you turn it off. Also i would use a small 12 volt muffin 
fan above the 572-b tubes to keep them cool. (There is no internal fan).
As you can see with no fan it is very quite. I am useing brand new 
Taylor matched 572-b tubes.
The original tubes Heathkit used in this model was Cetron 572-B/T160L.

To operate the HA-14 mobile amplifier you set the band switch to the 
disired band, do not turn it on. Load the exciter in a normal manner at the
desired frequency. The FWD and SWR functions of the Amplifier meter can 
be used in loading the exciter. Reduce the drive level of the exciter to a
minimum. Turn on the HA-14 Amplifier and apply a small amount of RF from 
the exciter. Peak the tune control for maximum REL PWR on the HA-14 
Amplifier meter.

The reason i went through the tune up is to show that you only use two 
knobs, band switch and tune control. The matching AC supply is the HP-24
and the matching DC supply is the HP-14.

I have used it mobile and except for replaceing the tubes (30 years old 
original tubes) i have had no troubles with the HA-14 amplifier or the 
DC and AC power supplies. If you
can find one it is still one of the best tube amps for mobile going. I 
am also useing the HA-14 with my Ten Tec Corsair II at home. (not for sale)

Mike (W6THW)

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NJ0IP wrote:

>This is a long shot, here.
>
> 
>
>Does anyone have a Heathkit HA14 Linear Amp (or the manual) and if so,
could
>you please email me the size and weight of the device.
>
>I'm interesting to know if it can fit as carry-on baggage in an airplane.
>
> 
>
>TNX
>
> 
>
>73
>
>Rick
>
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>TenTec mailing list
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>  
>
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