Cheap Microwave/inverter camping test
Submitted: Monday, Aug 06, 2007 at 15:20
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Robin Miller
Tested out suitability of using one of those cheap $60 microwaves
camping over the weekend.
They are 700watt output and require 1100 watts at 240vac.
These new units are relatively lightweight at 10kg and compact.
Tried this one (Black & Decker) off our $200 Ebay 1500 watt square wave inverter.
It ran ok , but it made a lot more noise than running off the mains.
The buzzing noise, caused by the wave shape was quite objectionable and we considered it such that the product failed as being suitable for
camping.
This is the first of a large number of products we have tested which failed when run from this type of inverter.
We expect it would pass with a sine wave inverter.
Robin Miller
Reply By: hl - Monday, Aug 06, 2007 at 16:03
Monday, Aug 06, 2007 at 16:03
The buzzing noise would most likely be caused by the input filter choke inside the oven. Bypassing that and possibly removing the capacitors would solve the problem. An inexpensive power board with a built in filter could be used if you wish to run the unit off the mains.
Cheers
AnswerID:
256091
Follow Up By:- Monday, Aug 06, 2007 at 16:39
Monday, Aug 06, 2007 at 16:39
Hi Hl
Could be to , was tempted to pull it apart , but it wasn't
mine.
Was serious deep noise to , otherwise would not have commented
, which was completely gone on mains.
If for me , I think I would check out one of the interter models from Panasonic.
Robin Miller
FollowupID:
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Reply By: Member - Littleborgy (SA) - Monday, Aug 06, 2007 at 16:15
Monday, Aug 06, 2007 at 16:15
Hey Robin... Where's your screen name gone?
AnswerID:
256094
Follow Up By:- Monday, Aug 06, 2007 at 16:40
Monday, Aug 06, 2007 at 16:40
Hi LittleBorgy
? looks ok here
Robin
FollowupID:
517209
Follow Up By: Member - Duncan W (WA) - Monday, Aug 06, 2007 at 19:55
Monday, Aug 06, 2007 at 19:55
Nah you've microwaved your screen name. It's done a bunk.
FollowupID:
517230
Follow Up By: Robin Miller - Monday, Aug 06, 2007 at 21:08
Monday, Aug 06, 2007 at 21:08
Was blank all right Guys , don't know whats happening to system to-night , have re-entered so will see results with this reply
Robin Miller
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Follow Up By: Pajman Pete (SA) - Tuesday, Aug 07, 2007 at 08:11
Tuesday, Aug 07, 2007 at 08:11
Works now Robin
FollowupID:
517286
Reply By: Mainey (WA) - Tuesday, Aug 07, 2007 at 13:10
Tuesday, Aug 07, 2007 at 13:10
Robin Miller posted-> "The buzzing noise, caused by the wave shape was quite objectionable and we considered it such that the product failed as being suitable for
camping. This is the first of a large number of products we have tested which failed when run from this type of inverter (square wave)
We expect it would pass with a SINE wave inverter."
Yes Robin,
looks like a good reason to use only the most efficient electrical technology equipment, as in 'pure sine wave'
inverters !
AnswerID:
256243
Reply By: Ron173 - Wednesday, Aug 08, 2007 at 13:33
Wednesday, Aug 08, 2007 at 13:33
Hi Robin,
Sounds like when on the inverter the magnatron was struggling to excite properly.
A higher rated inverter would prob help too.
Rgds
Ron
AnswerID:
256403