Hydroponics Online Store



Hydroponic Systems

Hydroponic Grow Lights & Bulbs

Hydroponic Tents & Grow Boxes

Hydroponic Ballasts

Grow Light Reflectors

Hydroponic Nutrients

Grow Media Rocks

Hydroponic Pumps

Hydroponic Pots

Hydroponic Books

Meters

Hydroponic Exhaust Fans

Hydroponic Seeds

Hydroponic Foggers

Home Store Blog Forums FAQs Lesson Plans Pictures


Search:



400 Watt Linear Amplifier - Palomar 300A For Sale


400 Watt Linear Amplifier - Palomar 300A



This item has been shown 0 times.

Buy Now

400 Watt Linear Amplifier - Palomar 300A:
$257

Now up for offer is a nice Palomar 300A HF Linear Amplifier! The 300A is a 40-10 meter amplifier with six sweep tubes in grounded grid. In low power mode, the exciter drives the final four sweep tubes and 100 watts drive will yield around 400 watts output! In high power mode, the two tube driver stage is placed in operation (bypassed in the low power mode) and the drive requirement is reduced to 1 to 10 watts. I know this sounds backwards, but DO NOT drive this amp with more than 10 watts in the High Power Mode! (Think about amp power instead of exciter power) In High Power Mode, a 4 or 5 watt drive will yield about 325 watts output! This amplifier layout works very well, the amplifier was very popular with the 10 watt rated radios and QRP rigs. The power supply is a very well done doubler circuit and replacement transformers are sold by Peter Dahl. The power supply is separated from the Amplifier Deck, so your operating area is clean and uncluttered.

This amp has the power supply connected by cable. This particular amp has the black face with the batwing toggle switches. The case is chrome. Cosmetically, this one is very nice. No major dings, dents, or scratches and the chrome is not pitted. The majority of the scratching is on the power supply, but it is the Black Crackle Type finish and is easily spray painted. This is a nice one, so don’t miss it!

The amplifier comes with a copy of the Operating Manual. It’s pretty straight forward, though brief.

If you don't know what you are doing, don't offer on this amp.

I accept all forms of payment.

International buyers are always welcome.

Feel free to email me with any questions you may have.

Good Luck and Happy offerding!

NOTE: Shipping will be in two boxes. I generally remove the tubes, bubble wrap them, and put them inside the amp if there is a fit. Having a steel case around the carefully packed tubes beats getting them banged around in a cardboard box.


Buy Now


 

Hydroponic Forum Discussions:

Can I use the same nutrients for lettuce and strawberrys?
••potassium silicate••
new here, questions. starting medium, seeds.
Help me finish this set up please.
Any Idea What This Is ? fungus or disease?
NFT Setup in Florida Keys
space and wattage ?
Hydroponic Lettuce Fertilizer 24-15-36
Setting up a Kratky system for Baby Greens and DWC for larger plants
organic hydro nutrients?
My Very First Setup
Can you water-stress hydroponic plants?
Newbie - want to produce fennel (Foeniculum vulgare) and ruta (Ruta graveolens)
35 day old system...
Thoughts on my setup?
Real Newbie Question
Heirloom Tomatoes Yummy Yummy
distance from light to plants
Flood an Drain Shedule for Beans
Prevent algae growth

Popular Hydroponic Items:


Range Rover Land Rover Fomoco Ah22-19h424-ad Bumper Parking Camera  picture
Range Rover Land Rover Fomoco Ah22-19h424-ad Bumper Parking Camera


1.2 Ghz 6 Watt Stripline Rf Amplifier Flm6472-6f picture
1.2 Ghz 6 Watt Stripline Rf Amplifier Flm6472-6f


Strap For Handheld Radio picture
Strap For Handheld Radio


Icom Ic-2410 Parts Used picture
Icom Ic-2410 Parts Used


Mfj Intelli Tuner Automatic Antenna Tuner Manual Used picture
Mfj Intelli Tuner Automatic Antenna Tuner Manual Used


Mfj Hf/vhf/uhf Swr Analyzer Manual Used picture
Mfj Hf/vhf/uhf Swr Analyzer Manual Used


150 Watt Hf Transceiver Amplifier Tc-300 Hf Ham Radio Amplifier Fm-ssb-cw-am picture
150 Watt Hf Transceiver Amplifier Tc-300 Hf Ham Radio Amplifier Fm-ssb-cw-am


Kit Lpf Unit Kit For 100w Hf Power Amplifier picture
Kit Lpf Unit Kit For 100w Hf Power Amplifier


150amp 15.5vdc Regulated Power Supply picture
150amp 15.5vdc Regulated Power Supply


Johnson Viking Thunderbolt Linear Amplifier - Hf - Am, Ssb, Dsb, Cw - 2000 Watts picture
Johnson Viking Thunderbolt Linear Amplifier - Hf - Am, Ssb, Dsb, Cw - 2000 Watts