Anyone know the conversion for this band... Probably a simple snip of a wire or something...
Thanks.
Thanks.
-
You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
-
A Winner has been selected for the 2025 Radioddity Cyber Monday giveaway! Click Here to see who won!
QRO Conversion for HF 2500DX for 10/11 Meter Operation????
- Thread starter High Miler
- Start date
Got close enough to one of these at Dayton to touch it.
'Bout as close as I'll get. They don't seem to break much, so it may be a while before I see one for that reason.
Seems to me they're still in business. Make them think you're a ham, they should be obliged to spill the beans for 10-meter use.
QRO web site
73
'Bout as close as I'll get. They don't seem to break much, so it may be a while before I see one for that reason.
Seems to me they're still in business. Make them think you're a ham, they should be obliged to spill the beans for 10-meter use.
QRO web site
73
Hello All:
The neat O thing about the DX2500 is that it uses the Soviet 4CX800 Tetrodes, in a grid driven circuit.
With a slight modification to the Control Grid Circuit a step up toroid transformer like the one in Pride DX300 can be used to allow a stock low power radio to drive the amp to its full output power.
The neat thing about Tetrodes in a grid driven circuit, it wont take any power to drive it. The power is applied to a 50 ohm resistor across the grid to allow the radio to see a perfect 50 ohm load.
This tetrode grid drived design allows a step up transformer and higher value load resistor to be used, just like in the Pride DX300 Amps.
Jay in the Mojave
The neat O thing about the DX2500 is that it uses the Soviet 4CX800 Tetrodes, in a grid driven circuit.
With a slight modification to the Control Grid Circuit a step up toroid transformer like the one in Pride DX300 can be used to allow a stock low power radio to drive the amp to its full output power.
The neat thing about Tetrodes in a grid driven circuit, it wont take any power to drive it. The power is applied to a 50 ohm resistor across the grid to allow the radio to see a perfect 50 ohm load.
This tetrode grid drived design allows a step up transformer and higher value load resistor to be used, just like in the Pride DX300 Amps.
Jay in the Mojave
Re: QRO Conversion for HF 2500DX for 10/11 Meter Operation??
I've been looking at the schematics for this amp; what happens when you switch it to the 10/11 meter position? Is the amp bypassed or does it switch into transmit but has no output?
.
High Miler said:
I've been looking at the schematics for this amp; what happens when you switch it to the 10/11 meter position? Is the amp bypassed or does it switch into transmit but has no output?
.
you just put the band on 10m and tune it with 5 watts then bump it up to 35 and you're done
My neighbor & Best friend recently purchased a New Elecraft 500 watt & 1500 watt amplifier & both of them operate 10 meters right out of the box? I thought that provision was removed several years ago by the FCC? I have another friend with a New Acom & it needed no modifications either? Pretty sure the SPE Expert amplifiers work right out of the box as well on all bands.
