[TenTec] FS: Hercules II Amplifier etc.

[Donn Bennett]

Hi Michael,

If no one has beaten me to it I will buy the Herc II. I don`t need the 
power supplies

Please let me know and send an address.

73,
Donn Bennett    WB8ZNM
14590 N. Swan Rd.
Tucson, Az. 85739
520-825-1444

Michael Melland wrote:

>I've decided to sell my Hercules II amplifier to support other interests.
>I'd prefer to sell the amp and power supplies as one but will sell
>separately.  Shipping can be arranged at actual UPS cost at buyers expense.
>
>**Hercules II Solid State Amplifier-
>Cosmetically and electrically excellent.
>http://webpages.charter.net/w9wis/tt3.jpg  Easy 500-550 watts output with up
>to about 60 watts drive in the HF band.  Will auto-bandswitch with the Omni
>V and Omni VI / Omni VI+.... it's like having a 500 watt radio !  Has
>original manual and connectors.  I will include the almost unobtainable
>Model 236 control cable with the amp.  This cable allows the auto
>bandswitching to work with the previously mentioned rigs.... and it has a
>pigtail so the 301 knob or computer control can also be use at the same time
>off the serial port................
>
>There are two very simple modifications made to the amplifier that were done
>at the recommendation of Gary Larson at Ten-Tec Service.  One is the removal
>of D11 (1N4002 diode) on the control board and replacement with a jumper.
>This allows the Jupiter to properly key the amplifier.  Apparently this
>diode was there for grid block keying rigs and the voltage drop affects the
>low voltage keying of the Jupiter's TX EN/Out system.  The diode is not
>needed unless you are using a grid block keying exciter.... I'll send a new
>diode along with the amp.... or reverse the mod and reinstall a diode if you
>want.  The second mod is the addition of a RF choke (16 Ohm, 650 mH) to the
>rca jack (TX OUT) on the Herc II.  The Jupiter is a VERY RF sensitive rig
>and Gary recommended adding the choke to keep any stray RF on the line from
>the Jupiter... which has no RF filtering on this line at all.  I can remove
>the choke if you want but it has no effect on keying at all... I'd leave it
>in if I were you........$850
>
>**Custom Dual Astron Model RS-70M 70 amp power for the Herc II.
>
>These two Astron RS-70M supplies are paralleled to provide the 80 amps
>necessary (and more) to power the Hercules II.  They are harnessed with
>custom power cables made of #2 welding cable and work extremely well.
>These are HEAVY linear supplies with current and voltage metering.  They are
>designed for parallel operation and have a link to slave the two
>regulators.... although these have been matched so well they would actually
>share the load better without the connection being made.  $400
>
>Buyer pays shipping cost as mentioned earlier.
>
>Mike
>
>--
>Michael Melland, W9WIS
>Winneconne, Wisconsin USA EN54pc
>qrp-l #1656 - qrparci # 9875 - iparc #252
>ars #1075  -  http://webpages.charter.net/w9wis/
>
>
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