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:

Anyone try those automation products?
Heirloom Tomatoes in Rockwool - My first setup
Beginner troubles
Hydroponics System Care and Maintenance
Hydroponics System Care and Maintenance
Hydroponics in the winter
New member with a question.
Room or a tent?
First effort drip bucket system 14 headed to 20!
I have a question.
Hot climate growing pains!
Newbie here with a question of course.....lol
Should I be concerned about this mold?
What wrong with my leaves?
Newbie Could Use Some Advice
New hydroponics setup!!
Need sage advice, I can't seem to make this work. :(
Tomato Lower Leaves Yellowing
Fogging basil!
Struggling with my bell peppers

Popular Hydroponic Items:


Linear Amplifier 10m 11m, Rm Kl 35 picture
Linear Amplifier 10m 11m, Rm Kl 35


2 Used Rca 8122 R-f Output Tubes, Used 10 Hours, For Ncl 2000 R-f Amplifier picture
2 Used Rca 8122 R-f Output Tubes, Used 10 Hours, For Ncl 2000 R-f Amplifier


Ten-tec Titan 425 Amateur/ Ham Radio Legal Limit Amplifier With Spare Tubes picture
Ten-tec Titan 425 Amateur/ Ham Radio Legal Limit Amplifier With Spare Tubes


Texas Star Dx500v Amateur Amplifier picture
Texas Star Dx500v Amateur Amplifier


Ham Radio Amplifier picture
Ham Radio Amplifier


Broadband Hf 160-10 Meters Qrp Amplifier - Tech Special picture
Broadband Hf 160-10 Meters Qrp Amplifier - Tech Special


Hot Buy Sale 2 100 Ohm 10 Percrnt Sandblock Resistors Ham Radio Amp picture
Hot Buy Sale 2 100 Ohm 10 Percrnt Sandblock Resistors Ham Radio Amp


Low Noise, High Gain, Wideband Rf Amplifier Module (0.5 - 1600 Mhz) picture
Low Noise, High Gain, Wideband Rf Amplifier Module (0.5 - 1600 Mhz)


Flu17xm  L/s Band Medium Power Gaas Fet 32.5 Dbm picture
Flu17xm L/s Band Medium Power Gaas Fet 32.5 Dbm


Palomar 4 Linear  picture
Palomar 4 Linear