Texas star 667v

[NCA Gunsmith]

The 667 is a finicky animal. I've had 4 if them. 1 I had wouldnt squinch put more than 400 watts ( and it was new, I sent it back to texas star 3 times, and it never was right, so they just replaced it), 2 that ran right at about 550 PEP with a 2.5w drive swinging to about 30w, and one that was a frickin monster and ran about 700-750 depending on the radio I was pushing it with. Always been a big 667 fan,then.....

I picked up an old tx-four hundred the other day ( 1980s i think) that is also a 1x4 amp,it has RF85s in it ( military equivalent to the MRF454, or the SRF3795) and it runs out and sounds better than any of the 667s I ever had,and it does around 550+ PEP AM and was kissing a solid 800 on SSB.


I think there are a lot of variables no matter what amp you get. And remeber, the model number printed on the front of most amps ( like the dx667) isn't the output wattage. It's a model number in most cases. I've had amps that were labeled as 1000 that did 500, and I've had amps labeled like 150 that would PEP 400 watts with ease...

 

[vswr]

The 667 is a finicky animal. I've had 4 if them. 1 I had wouldnt squinch put more than 400 watts ( and it was new, I sent it back to texas star 3 times, and it never was right, so they just replaced it), 2 that ran right at about 550 PEP with a 2.5w drive swinging to about 30w, and one that was a frickin monster and ran about 700-750 depending on the radio I was pushing it with. Always been a big 667 fan,then.....

I picked up an old tx-four hundred the other day ( 1980s i think) that is also a 1x4 amp,it has RF85s in it ( military equivalent to the MRF454, or the SRF3795) and it runs out and sounds better than any of the 667s I ever had,and it does around 550+ PEP AM and was kissing a solid 800 on SSB.


I think there are a lot of variables no matter what amp you get. And remeber, the model number printed on the front of most amps ( like the dx667) isn't the output wattage. It's a model number in most cases. I've had amps that were labeled as 1000 that did 500, and I've had amps labeled like 150 that would PEP 400 watts with ease...

I never understood how a 2sc2879 could overdrive to develop anything over 100 watts. I have a 667 and all Ive ever seen on calibrated meters has been 350 watts peak and 250 rms. Measured in USB with 11 watts out from a cobra 2000, and then 20 watts from a SDR. Ive seen crazy claims about these but with all my amps, sweet 16, 667, boomer 500, multiple palomar 2 pill jobs, ive never seen any of them outperform the specs of their transistors.

 

[Smiley429]

A good Texas Star 667 could easily do 625-650+ Watts all day peak on AM and SSB with 15V to the power leads. They were also fairly clean amplifiers and I still use the ones I have over the years. You need to inspect the bias Voltage to the base of the transistors since they were developed with a resistor network and choke. A higher Voltage (bias) will give you good gain at low drive levels but ultimately know down the peak power and sound stuffy to my ears. A good input tune is required but people forget that it is one driving four, and a little help on the output of that driver stage (tune) certainly helps. It can turn a dud into a dragon.

 

[vswr]

A good Texas Star 667 could easily do 625-650+ Watts all day peak on AM and SSB with 15V to the power leads. They were also fairly clean amplifiers and I still use the ones I have over the years. You need to inspect the bias Voltage to the base of the transistors since they were developed with a resistor network and choke. A higher Voltage (bias) will give you good gain at low drive levels but ultimately know down the peak power and sound stuffy to my ears. A good input tune is required but people forget that it is one driving four, and a little help on the output of that driver stage (tune) certainly helps. It can turn a dud into a dragon.

Id like to see a video ofvthat for sure

 

[Smiley429]

Id like to see a video ofvthat for sure

So would I!