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- Sep 12, 2007
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Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please
If you're going by a very specific model with shipping to Alaska, I have to concede.
However, most people aren't locked to the same requirements. My best score was a lot of SEVEN power-ten 0-20V 0-50A for $77. The stuff in "unknown condition" works 80% of the time, and the stuff "for parts or repair" works 60% of the time.
If you're only looking for "modern" supplies, I got a sorensen DCS (1kw) for $100, which is a current model. I got a lambda GEN (1.5kw) which is a current model for $200. I got a lambda EMS (2kw) which is an only-recently retired model for $100.
Don't be afraid of older models if they're made in the US. The fundamental internal design has remained identical for the last 30 years:
mains -> filter -> rectifier -> storage caps -> half/full FET bridge -> ferrite transformer -> smoothing inductor -> output caps.
The main advances have been in remote programming like GPIB and rs232 or in power factor correction. If you're using the front knobs and don't care about power factor, they're all quite similar in performance.
If you're going by a very specific model with shipping to Alaska, I have to concede.
However, most people aren't locked to the same requirements. My best score was a lot of SEVEN power-ten 0-20V 0-50A for $77. The stuff in "unknown condition" works 80% of the time, and the stuff "for parts or repair" works 60% of the time.
If you're only looking for "modern" supplies, I got a sorensen DCS (1kw) for $100, which is a current model. I got a lambda GEN (1.5kw) which is a current model for $200. I got a lambda EMS (2kw) which is an only-recently retired model for $100.
Don't be afraid of older models if they're made in the US. The fundamental internal design has remained identical for the last 30 years:
mains -> filter -> rectifier -> storage caps -> half/full FET bridge -> ferrite transformer -> smoothing inductor -> output caps.
The main advances have been in remote programming like GPIB and rs232 or in power factor correction. If you're using the front knobs and don't care about power factor, they're all quite similar in performance.
