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Tektronix 485 Analog Oscilloscope
TechWorld-43228 (50644)
98.7% positive feedback
Price:
$149.99
Free shipping
Returns:
30 days returns. Buyer pays for return shipping. If you use an eBay shipping label, it will be deducted from your refund amount.
Condition:
- Buy It NowTektronix 2220 - 60 MHz DIGITAL STORAGE Oscilloscope - Free Shipping
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About this product
Product Identifiers
BrandTektronix
MPN485
Model485
eBay Product ID (ePID)96961733
Additional Product Features
Vertical Sensitivity5 Mv/Div to 5V/Div
Channels2 Channel
Time Base Range1ns/Div to 0.5 S/Div
Bandwidth350MHz
TypeAnalog
Input Impedance1 MΩ with 20pF
All listings for this product
Ratings and Reviews
Most relevant reviews
- Aug 10, 2019
a solid 350MHz oscilloscope for everyday bench use
The 485 is a better-than-entry-level dual trace scope. It is good up to 350MHz (50 ohm input) and 250MHz (1 Mohm input), making it usable for most amateur radio work. Like all Tek scopes of this era is is built like a tank, with first quality components. It has some nice added features, too: like the ability to use active tek probes. For most people, this is the only scope they will need. Several cautions... this is one of the Tek scopes with custom ICs, which makes repair more difficult. The mechanical construction is also very tightly packed and the simplest repairs may require a lot of disassembly, including a fan that isn't easy to remove. Finally, like any scope this age, checking the power supply capacitors is a must, especially if this scope is destined for regular use on your bench.Verified purchase: YesCondition: Pre-owned
- Feb 17, 2018
One of the Finest Scopes of its Day - Light, Small and Fast.
I Have used a Tek 485 as my main go-to bench scope for all general purpose trouble shooting and measurement. Rarely do I ever tax its impressive speed of 350MHz, but have on occasion challenged it with signals approaching 400MHz which it does not falter at. They do have some issues though, being that they are now well over 30 years old. Plan to experience capacitor end-of-life failures. The power supply is one of tektronix' early switch mode designs, and can be finicky. It is reliant on a switching transformer that has a history of being the weakest link in the system, and is only obtainable from another 485 donor scope.If you have one of these scopes, and plan to keep it in regular use, keep you eye peeled for a parts donor unit, and plan to replace the capacitors in the power supply and regulator boards, and to check the tantalum caps that feed off the various power rails. Otherwise this scope, like most Tek scopes is built like a brick outhouse, but behaves like a chicken on methamphetamines. Crisp, tight and fast CRT can get show me images that my $11,000 DSO can't always see, and when I want a simple but capable analog view, this is my faithful little workhorse. Though there are a number of custom unobtainuim Tek ICs and other critical parts, like that main switching transformer, I expect to keep this fine old scope sweeping until fate does us part.Verified purchase: Yes
- Sep 06, 2017
Expected Troubleshooting
I first turned on the scope a resistor burned up in the power supply board . I found a shorted tantalum cap causing the problem. I also found that several diodes had been lifted on the power supply board. I replaced one of the lifted diodes and installed the other diodes. I powered up the scope and I got it functioning on one channel. The fan was very noisy and needs attention along with one of the channels. I am still in the process of troubleshooting the scope.Verified purchase: Yes
- Jun 30, 2016
485 scope for parts or repair
I Don't recomend this because it was a "one-off" ! A very high quality instrument, let down it seems, by the Mains PSU - a Tektronix I.C. of which appears to have died. The rest proved to be functional. It remains in its box awaiting major PSU surgery !Verified purchase: Yes
- Jul 15, 2017
Bought for parts. Solved my Tektronix 485 problems.
I bought this for parts to repair my Tektronix 485. Luckily the parts I needed were good on this unit. My 485 is now working properly!
Verified purchase: Yes
- Feb 17, 2016
Scope
I replaced a very tired 485 with this one and am very satisfied with itVerified purchase: YesCondition: Pre-owned
- May 30, 2024
Very nice TEK 485 for the age! Thank you!!
Very nice TEK 485 for the age! Thank you!!Verified purchase: Yes
