[Noisebridge-discuss] Transistor question

Chris Murphy chrisnoisebridge at gmail.com
Sun Mar 17 17:04:20 UTC 2013


Thanks Mitch!

Mike taught me how to fox hound a stereo amplifier. It only took him a minute or two to identify the broken A798 in the left channel of the first stage audio. It makes me want to practice on more broken amplifiers. 

I'm going to do the repair when the parts arrive in the mail. 

Thanks again,
Chris 

Sent from my iPhone

On Mar 17, 2013, at 1:34, Mitch Altman <maltman23 at hotmail.com> wrote:

> Hi Chris,
> 
> I'm not familiar with this PNP transistor pair, but I took a look at a datasheet online, and it says nothing about any of these markings, so you probably guessed correctly that the marking on the 2nd line on each transistor can be ignored as some manufacturer's mark.
> 
> What are you making?
> 
> Best,
> Mitch.
> 
> 
> ----------------------------------------
>> From: chrisnoisebridge at gmail.com
>> Date: Sun, 17 Mar 2013 00:25:57 -0700
>> To: noisebridge-discuss at lists.noisebridge.net
>> Subject: [Noisebridge-discuss] Transistor question
>> 
>> I need to order a replacement A798 transistor in a ZIP-5 package.
>> 
>> I notice the markings on the components for sale usually have A798 on the top line and on the second line either: 14G, 72F, 31G, 73G etc.
>> 
>> What does the second line designate? Is it a specification of the component such as pinout or is it a manufacturers mark? Should I just ignore it?
>> 
>> If you want to see pictures, eBay has a large selection of 2SA798 transistors.
>> 
>> Thanks for listening,
>> Chris
>> 
>> Sent from my iPhone
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