Would a light sand of the leads before soldering or breadboarding help?

Sure, but that's just insane.

Resistors cost about a penny, how much is your time and sanity worth?

 

The NEC 766A is an RF transistor, good for the UHF range

 

Is the NEC766A germanium?

 

Is the NEC766A germanium?

I took the photo just to show another example of the components I acquired. I'd have to check a datasheet to see if it ge or si.

 

Sure, but that's just insane.

Resistors cost about a penny, how much is your time and sanity worth?

Not enough. I have time but not much money and the jury is out on my sanity. Lol.

 

Gold recovery from failed parts makes sense, while gold recovery from "Like-new"/old stock is a heresy!
And I do wonder about those components from Chinese companies, both the actual quality and how close the specifications are. How available are those parts? and where can they be purchased in hobby quantities? What sort of pricing will we see?

And my guess is that the NEC 766A device is some sort of dual gate FET that is quite static sensitive.

 

I did some research on the NEC V766A. It is as said above, used for UHF. I read one article saying it was used in a microwave set-up back in 1972 or there abouts to bounce signals off the moon to track it.
I did find a couple of Motorola dual gate FETs though. I was thinking they might be good for modulation. Would that be correct?

 

I acquired a retired technicians kit of electronics parts for $60. There are over $100 worth of resistors, plus 74xx ICs, 100 germanium diodes, and old TV and radio components. Is it worth keeping 74xx ICs? LM370N and LM565 CAN, LM710, any of these worth keeping? I have some parts that look like they belong in an electronics museum. One crystal is dated 1944.

My gut feeling is to throw 74xx out but I have that niggling 'what if ...' I think I might be a hoarder. LOL.

I think it's better to keep this. None of the components sounds useless to me.

 

Dual gate MOSFETS can be used for gain control (2 quadrant multiplication or AGC).

 

Dual gate MOSFETS can be used for gain control (2 quadrant multiplication or AGC).

Cool. In a VCA?

 

I did some research on the NEC V766A. It is as said above, used for UHF. I read one article saying it was used in a microwave set-up back in 1972 or there abouts to bounce signals off the moon to track it.
I did find a couple of Motorola dual gate FETs though. I was thinking they might be good for modulation. Would that be correct?

Dual gate mosfets are often used as both the RF amplifier and the first mixer in UHF receivers. They are also used in other receivers because they offer a number of benefits.

 

Re post #38 I think the warning is related to the fact that some RF power transistors contained berylium oxide. Look up "health hazard of berylium oxide" for more information.

Les.

 

Certainly it is wise to neither grind nor break those big power transistors. But it is simple to identify them because they do not look at all like integrated circuits. Not even at all similar.

 

Re post #38 I think the warning is related to the fact that some RF power transistors contained berylium oxide. Look up "health hazard of berylium oxide" for more information.

Les.

Thanks for that Les.

 

Certainly it is wise to neither grind nor break those big power transistors. But it is simple to identify them because they do not look at all like integrated circuits. Not even at all similar.

Are you still ... on about the relevance to the topic?

 

Cool. In a VCA?

Of sorts. Not really good for AM modulation but can be used to control the amplitude of signals. In my experience this works with (AC coupled) RF signals.

 

Of sorts. Not really good for AM modulation but can be used to control the amplitude of signals. In my experience this works with (AC coupled) RF signals.

Thanks for that Dick. I am trying to build as simple an analogue synth as I can and use components that are a bit different, if that makes sense. (Yet another thread topic for later.)

 

That warning is more likely about static sensitivity, which is far more common in FETs.

 

I live in Thailand, I just threw out my entire 1/4 Watt resistor stock as they were almost unusable due to lead corrosion.

My dad lived 50m from the ocean and plastic boxes have been stored in the garage but sealed and with silica gel. All of the equipment and parts are still in good shape.

View attachment 294502
NEC 766A. The note that came with it says 'caution'. Why would that be?

My suspicion is that this message has to do with static electricity, especially if this is a MOSFET.

 

I am very curious; how did you find that company?

I bought some kits on Aliexpress that came with LM3915N and ICL8038 chips which were marked with "HLF" and searched. You should find those chips being sold separately at Aliexpress and Alibaba.