Pride dx-300

[Master Chief]

Toy amps assembled by the handicapped with crappy connectors and poorly designed boards as you can see on Nomads website.

Designed for the CB market......and wallet. Simple mods fix the shortcomings of this amp.

You hate it so much, I wonder what you DO like. A Fatboy Base? God help us!

 

[AudioShockwav]

To each his own, but for myself, I would much rather run the 250-B than 8 or 10 or 12 sweep tubes. They stopped making them years ago, and will cost you a royal mint if you have to replace them.
Yes the pride has some flaws, but it is very fixable, and if used properly will live a long life.
One thing to remember is that sweep tubes were ment to be used in TV`s not RF amps, and if abused they will die just as fast as that 250-b will.

73
Jeff

 

[AudioShockwav]

Here is what Chris Aka Nomad has to say about the Pride DX 300....

The DX-300 was produced for a year or two in 1977 and 1978.

Reminds me of the Pontiac Firebird TransAm of that era. A small but potent package. In the hands of an unskilled driver, it can end up wrapped around a tree. Fast!

Here's the page for manuals and diagrams.

http://www.cbtricks.com/Amp/pride/dx300/index.htm

A 30 year-old amplifier will have issues from both age and mileage. Unless someone has 'caught up' the last 30 years of maintenance, it won't be safe to drive.

It is the ultimate "low drive" amplifier. It's a good match to a tube-type CB if the carrier hasn't been turned up too high, or to a solid-state radio with ONE final transistor.

Newer radios with two finals will be too much for it unless the Pride's input circuit is altered to cut the drive level down by about half.

The power you'll see depends on several factors, especially the particular brand and type tube you use. With a stock "B" version of the tube, you should see at least 500 Watt peaks. The "R" version of the tube is meaner, but you'll need to modify the adjustment range of the Pride's 'Bias' control to keep it from running too hot. With the "R", you could see between 650 and 750 Watt peaks, depending on other factors.

Internal wiring uses "push-on" pin connectors for the wiring harness. Trouble is, they used these pin connections for the amplifier's RF-output wiring. There is a "suicide intervention" procedure included with the info on my upgrade to the HV power supply.

http://www.nomadradio.com/HDHV

The DX-300 has a couple of other 'quirks', including a zener diode in the bias circuit that's just, plain too small. But once these personality 'quirks' are taken care of, it's a potent package. Just watch that lead foot in a tight turn.

73

And That is a direct quote from the guy that knows these amps the best.

73
Jeff

 

[KC8PCL]

I have a Pride DX 300, but the boards in it are different than any ones seen on any websites, Can anyone help me here with some information???

 

[AudioShockwav]

Can you post some pictures of the boards in question?
What is it not doing?

73
Jeff

 

[AudioShockwav]

Some pictures of the old boards used.

73
Jeff

 

[AudioShockwav]

Pictures of new NOMAD boards.

73
Jeff

 

[AudioShockwav]

Picture of Up-graded Keying circuity recommended by Chris @ NOMAD Radio

73
Jeff

 

[AudioShockwav]

And Here a link to the whole page.
http://www.nomadradio.com/HDHV
73
Jeff

 

[Se7en]

Nomad selling on eBay---> Pride DX300 Heavy-Duty High Voltage retrofit pc board | eBay

 

[AudioShockwav]

It is very hard to find anyone that has more hands on with old tube amps as Chris at NOMAD Radio does.

73
Jeff

 

[wavrider]

I have had a few of the Pride DX-300, great amps if not abused.

Have had several come across the bench over the years and most had HV boards damaged.

I remember back in the 80's I put Peter Dahl transformers into one of my Pride 300's.

I sold or traded it off but it found it's way back to my bench few months ago.

Burned up bias, burned up keying circuit the list goes on.

Back up and running again and the owner would not part with it as I tried my best to get that amp back with the Peter Dahl Iron in it.

 

[KC8PCL]

Can you post some pictures of the boards in question?
What is it not doing?

73
Jeff

Trying to figure out what the pin numbers are, and their locations on the board so I can trace the wires. Any help here would be greatly appreciated. I can't find any schematics on this board.

Thanks, 73
Dave

 

[wavrider]

Trying to figure out what the pin numbers are, and their locations on the board so I can trace the wires. Any help here would be greatly appreciated. I can't find any schematics on this board.

Thanks, 73
Dave

try this site full manual with schematics and picture.

Pride DX300 Manual

 

[KC8PCL]

Pride dx 300

Thanks for the response, but I have searched everywhere on the web only to find the newer version of this board. I think that this board is an earlier version that no one can find any information on it, But thanks anyway.