I understand. And you’re absolute right. I did with what I had available at the time.
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And thank you for your time and effort.
Sent from my iPhone 7
Stephen S. Nabet
On 19 Aug 2020, at 19:21, Dave Wise <email@example.com> wrote:
It's a much-talked-about complaint. In this particular case, it's unlikely since the transistors in question only operate in unusual cases - power off and overload, respectively.
Do you think [oscillation] could be an issue in the low power supply section?
But since we're doing Component Engineering figuring out a suitable retrofit part, why not put in 100% effort? Do work you can be proud of.
From: TekScopes@groups.io <TekScopes@groups.io> on behalf of Stephen via groups.io <firstname.lastname@example.org>
Sent: Wednesday, August 19, 2020 10:00 AM
Subject: Re: [TekScopes] SC502 With Display Issues
On Wed, Aug 19, 2020 at 05:48 AM, Dave Wise wrote:Ooh ok. Now I understand. You were talking about oscillation. This is the thing I didn’t grasp before from your previous post. Thank you for clearing that out. Do you think that could bean issue in the low power supply section?
To replace 2N3565 in the SC502 power supply, BC639 is better than 2N2222A,
100MHz vs 300MHz. Under a dollar at Mouser. But the best choice is KSC1008.
It's only 30MHz - perfect to avoid oscillation - and even cheaper. Mind the
On a side note, I’m trying to find parts that are readily available at my local shops because it’s just a 20min ride from my place.
And I know that if something fails, I can easily go and get them without having to order, and wait for (sometimes) a week to 10 days to get them. Yes, it’s terrible, I know.
BC639 is available. Not the KSC1008. I’ll try that.