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:

Dutch bucket tomatoes drooping, diseased?
Closed system nutrient replenishing
Dutch Bucket Spacing
Bato Bucket Size Question
Long Nute Change Interval Question
outdoors commercial setup, input needed
Hydro in AZ

Popular Hydroponic Items:


Heathkit Sb-200 Amplifier Works Great picture
Heathkit Sb-200 Amplifier Works Great


Palomar Model 500 Watt/swr Meter picture
Palomar Model 500 Watt/swr Meter


Heathkit Sb-230 Amplifier 600 Watts picture
Heathkit Sb-230 Amplifier 600 Watts


Ameritron Al-811h Amplifier picture
Ameritron Al-811h Amplifier


Palomar Tx 75  Amplifier  picture
Palomar Tx 75 Amplifier


Zx60-p162ln+, Mini-circuits Amplifier, 902/903mhz, 1296mhz, 1420mhz picture
Zx60-p162ln+, Mini-circuits Amplifier, 902/903mhz, 1296mhz, 1420mhz


Chimney Socket For Gu-43b (gu43b) Russian Tube picture
Chimney Socket For Gu-43b (gu43b) Russian Tube


Tetrode Gs-15b New, From Texas   (microwave,uuhf,tube,tropo,eme,plasma)  picture
Tetrode Gs-15b New, From Texas (microwave,uuhf,tube,tropo,eme,plasma)


Palomar Skipper 350 Base 10 Through 40 Meters Am, Fm And Ssb Ham Amplifier picture
Palomar Skipper 350 Base 10 Through 40 Meters Am, Fm And Ssb Ham Amplifier


Microwave 5ghz To 10ghz Low Noise Amplifier Lna  C , X  Band  Rtl Sdr Ham Radio picture
Microwave 5ghz To 10ghz Low Noise Amplifier Lna C , X Band Rtl Sdr Ham Radio