[ForSale-Swap] SOLD: Skywalker 500 HF Amplifier AND a 50 Amp power supply

[Bry Carling AF4K]

This amp has been sold. The 50 amp power supply is still available.

On 17 Dec 2015 at 7:41, 'Bry Carling AF4K' bcarling at c wrote:

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> FOR SALE:  Skywalker 500 HF Amplifier
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> This is their later model amplifier...
> 
>  * 500W output 160-10M 12 VDC power required - but really likes 13.8 V DC
> * Power output: SSB 500W PEP
> * CW/FM 500W (at 50% duty cycle)
> * Drive power for rated output: 20-40 W typical, 35 watts is the sweet spot.
> * Frequency range: 1.6-30 MHz continuous
> * Max. input current: 75A
> * Efficiency: 50-55% avg
> * Duty cycle:SSB Continuous voice modulation; CW/RTTY 50%
> * Keying: PTT line, 10 mA sinking to ground via RCA jack, RF sensing. Works FB with all 
> adjustable 100 watt class rigs.
> * T/R switching time: 20 mS
> * Operating class: AB with separate regulated bias circuits for each module
> * Modes supported: SSB/CW/RTTY/AM/FM
> * Thermal protection: 130 F limit switch, auto reset
> * Cooling: Two 120 mm muffin fans on heatsink and one 60mm muffin fan internal
> * Metering: Collector current for each module.
> * Transistors: 4-2SC2879
> * Input/Output Impedance: 50 ohm unbalanced, VSWR 2:1 max
> * RF connections: SO-239 sockets on rear
> * Power connections: 3/8" Dia. bolts for + and -
> * Dimensions: 6.5"H x 12"W x 7"D
> 
> Looks to be new and unused, but will sell as used. Covers the HF amateur bands in two 
> switchable ranges. The circuit is the same as AN-762 from Motorola and is very similar to the 500 
> watt amp by MFJ using the same 2SC2879 transistors. New price was around $600.00 for this 
> powerful amplifier. Used ones have sold in the range of $385.00 - $550.00 - this one is far less.
> 
> I know this is not for everyone, and it could use some extra RF filtering, but it does work and is a 
> nice heavy duty 500 watt ouput HF amlifier at a great price.
> 
> Available for $250.00 FIRM plus shipping.
> 
> ALSO available - ASTRON RS50M power spply in excellent working condition. 13.8V DC at 50 
> amps! Ideal for this amplifier. Will sell for $189.00 FIRM plus shipping.
> 
> Pictures and details available at:
> 
> http://af4k.com/radios.htm
> 
> 73 - Bry Carling, AF4K
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> Posted by: "Bry Carling AF4K" <bcarling at cfl.rr.com>
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