The correct venue for these reviews is the eHam Community Forum "Company Reviews". The product reviews is not the correct place for reviews of customer service and support or reviews of companies/dealers/manufacturers. NOTE: Product Reviews are not for reviews of customer service or support. ![]() The reviews are not a Forum for two-way exchanges, product inquiries, general discussions, complaints, help requests, product repairs or modifications. Products to be reviewed typically should be tangible ham radio related items such as radios, antennas, towers, test equipment, feedlines, etc.ĮHam's Product Reviews are intended to provide an opportunity to share an opinion, positive or negative, of a commercially available ham radio-related product or service.Ī valid product review is one where you have experience or knowledge of the product that you would like to share with others. If your new review has not been Approved after several days you can assume that it was found to not be within the product review T's&C's shown below during screening. Before adding a new product use the "Search" tool on reviews Home page to determine if that product already exists in a category.Ĥ. The delay can vary from minutes to a day or more.ģ. The delay is for new review screening and approval. There's a delay before newly submitted reviews are Approved and posted in eHam's reviews. eHam's Product Reviews are a database of ham radio related products and services personal opinions.Ģ. ![]() Maybe but seems virtually silent to me!ġ. A cynic might say that I just got a good one. Even while drawing 22 amps, I detect no audible problem. To hear the fan in this Jetstream ACPS, I had to turn off the amplifier and place the supply up to my ear. What's not to like? I will admit that there are other fans in my tiny shack, the 50 volt supply from the ALS600 linear and the fan in the amp itself. Just finished a brief scan of the bands 160 -17 meters and no birdies. Almost 22 amps and no increase in the fan. Set the rig to RTTY mode at 100 watts and keyed it up. When the supply first started up, there was a momentary whoosh of the fan (about at the level of my MFJ Mighty-Lite I used previously). Connected the IC 7300, connected the mains power, added a generic ferrite to the power cord, connected the radio and turned it on. This is a follow-up to my previous review expecting great performance from this cost effective ACPS. It otherwise appears to be a very stable and RF quiet power supply with good output.Įdit to say that I did bypass the thermistor and it works perfectly. I believe I'm going to do what NI5Y did and just take the thermistor out of line and run without it. ![]() This extreme heat cycling can't be good for it. If the thermistor activation is set high (as it appears mine and some other units were), the unit will get quite hot and when finally activating, the speed controller puts the fan at full speed for at least a minute. The fan RPM will never get high and the unit will stay cool and quiet. If the thermistor activation is set fairly low, the fan will come on at a low speed set by the fan speed controller. And I think that some people have a bad or at least badly set/calibrated thermistor. This does have a variable fan speed controller but it appears that this is gated by a thermistor. After some time with this and tinkering a bit I think I know what the disconnect is between the reviews with respect to fan noise.
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