hd350 texas star

[airplane1]

AudioShockwav, thank you for all your help. I got antsy and drove to DTBand he put a new keying transitor on Sat. it works great now. you went all out to help me as well as others on here tried to help. im sorry i dont get on the computer much or i could have saved you a little time.
thanks again.

 

[9C1Driver]

A keying transistor in a Texas Star is a pretty simple 5 minute fix. Glad you went that route rather then mess around with returning the amp. Does yours have the DEI or HG finals?

 

[Ranch55]

Just for clarification, DEI 2879 transistors are HG transistors .......

 

[AudioShockwav]

Just for clarification, DEI 2879 transistors are HG transistors .......

I have been told the same, they were manfactured by HG.
I was also told if you want to throw down a wad of cash you can have your name stamped on them.....

73
Jeff

 

[Shadetree Mechanic]

I have been told the same, they were manfactured by HG.
I was also told if you want to throw down a wad of cash you can have your name stamped on them.....

73
Jeff

But are they the same inside? I was under the impression that they tuned differently.

 

[AudioShockwav]

I asked that as well, and was told that the DEI branded transistors were one of the early versions of HG and they were making changes in the beginning.
I think this is why some of the different lots of HG 2879 tuned different from the lot before.
Toshiba had already figured out and perfected the manufacturing process so you got a very constant product .

73
Jeff

 

[144inBama]

Do not take this as gospel as I'm "assuming & assembling" statements/impressions from techs and other boards but.... DEIs were the "intro" market brand and as you know, didn't have a solid standing in the RF world but was the best available at the time. So, as the revisions rolled out and their quality improved, they changed (branched off) into HG because DEI now had a subpar reputation for quality whereas "HG" was new and providing better transistors. Basically, It's easier to get people to take a chance on a new company than convince them to keep buying from one with a poor reputation.
At least that's my interpretation of it all.

 

[Ranch55]

But are they the same inside?

Looking at the inside of a HG and a DEI under a large magnifier, yes, they are the same inside.
Construction is the same, tabs are the same, all appears identical.