Hi,
First post new here, not new completely to electronics in fact in 90’s bought and sold surplus test equipment pre-eBay. I have spent 4 days reading and watching youtube videos on scopes and the video Dave did on the Agilent 64622 scope he used to use interested me to look at it or the HP64645. You might ask is why a 20 year old scope versus a Rigol or Siglent, really its a lack of confidence in chinese QC. I need to buy a $500 scope that works, no b.s. and sending it back to the US for repairs isnt an option. I have confidence in both reliability and accuracy of HP and Tek, and dont need 4 channels.
I have lived where there are no local distributors or even anyone I know uses scopes except automotive. We receive cheap really crappy junk unsellable in the USA it seems from China that they dump here in Latin America ( no FTC or consumer protection like the US). I never had the things happen QC wise with Chinese products in the states. Here, completely different. I had an electrolytic capacitor catch on fire inside a DVD player, forks and spoons rust and corrode in few months, LED bulbs 50% failure rate even though UL approved supposedly, etc. I could go on and on, I have a really huge disrespect for this behavior of dumping junk like this here as they take advantage of low income consumers.
So I have read all these people buying these $300-400 Chinese scopes and they look pretty decent externally. Inside they look ok too. I dont know how good the shielding is, or heat syncing designs or other trade offs I am making if I go with a new scope versus a old standby brand. I have read various comments good and bad on the Rigol encoder knobs, software issues, etc. not sure if this is all 4 year old software old bugs now fixed or still exists. The iPhones of course are made in China and the QC is amazing.
I am retired and planning to do waveform research at my shop on audio signals and circuits, max is human hearing range of 8hz to 20khz. No digital arduino stuff or logic really except 555 timers maybe just all old analog circuits related to guitar pedals and effects. No microwave or RF.
I want to do Frequency domain work eventually and the sampling FFT and store waveforms I capture to perhaps design circuits to emulate vacuum tube frequency response, study the VST software tone emulations, Kemper digital unit, Roland COSM effects, Line 6 emulated, etc. I have basic data acquistition experience in Ultrasound back in the 80’s so not starting completely newbie.
In the past have used Tek 465, 475, 7000 series mainframes, but they are not an option as they weigh a ton and risk breaking crt’s in transit. I have even used really old reliable tube scopes like the 400 series in the 70’s analog.... but never owned a digital scope or touched any since 1990’s. The companies I worked for were all strictly HP and Tek, no “secondary” brands like Leader, BK, etc brands. So I have put aside the prejudice of Chinese experience with other products to look at the Siglent and Rigol also. Any comments welcomed about your experiences with Chinese 50-100mhz scope models and customer service in the States, I was shocked to see Rigol is in Beaverton where TEK was born. Thanks in advance.