Powering up with a VARIAC

355F1 · 28th May 2010, 03:11 PM

Hello Chaps,

My name is Orazio and this is my first post.

I have several Revox Pr99s that have been stored for over a decade. All decks power up and I don't see any functional issues but since they have not been used for years all electrolytic capacitors should be replaced but it would be a lot of work.

I have been thinking to power them up using a VARIAC in order not to blow up electrolytic capacitors that inevitably will need replacement.

My question is, what kind of VARIAC should I use and how many amps? I do not want to spend a fortune in an expensive VARIAC just for playing with these tape decks.

Please advise.

Kind regards,

Orazio

adason · 28th May 2010, 03:14 PM

any variac for few hundred watts should do
like this one...
Technipower W5MT3 Variac Autotransformer/Transformer - eBay (item 290438294245 end time May-28-10 12:59:28 PDT)

adason · 28th May 2010, 03:15 PM

or this one...up to 5A...with meters, so you can see how much its taking
Technipower W5MT3A Variac (Vout: 0-140V/0-5A) - eBay (item 390199276972 end time May-28-10 16:21:09 PDT)

mickeymoose · 28th May 2010, 04:05 PM

Cheap: Use a bunch of 110V incandesced lightbulbs in parallel with each other, but in series with the DUT. Screw them in one at the time to bring up your voltage. E

28th May 2010, 03:11 PM	#1
355F1 diyAudio Member Join Date: Mar 2008 Location: McLean, VA	Powering up with a VARIAC Hello Chaps, My name is Orazio and this is my first post. I have several Revox Pr99s that have been stored for over a decade. All decks power up and I don't see any functional issues but since they have not been used for years all electrolytic capacitors should be replaced but it would be a lot of work. I have been thinking to power them up using a VARIAC in order not to blow up electrolytic capacitors that inevitably will need replacement. My question is, what kind of VARIAC should I use and how many amps? I do not want to spend a fortune in an expensive VARIAC just for playing with these tape decks. Please advise. Kind regards, Orazio

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28th May 2010, 03:14 PM	#2
adason diyAudio Member Join Date: Nov 2004 Location: home sweet home	any variac for few hundred watts should do like this one... Technipower W5MT3 Variac Autotransformer/Transformer - eBay (item 290438294245 end time May-28-10 12:59:28 PDT)

28th May 2010, 03:15 PM	#3
adason diyAudio Member Join Date: Nov 2004 Location: home sweet home	or this one...up to 5A...with meters, so you can see how much its taking Technipower W5MT3A Variac (Vout: 0-140V/0-5A) - eBay (item 390199276972 end time May-28-10 16:21:09 PDT)

28th May 2010, 04:05 PM	#4
mickeymoose diyAudio Member Join Date: Nov 2008	Cheap: Use a bunch of 110V incandesced lightbulbs in parallel with each other, but in series with the DUT. Screw them in one at the time to bring up your voltage. E

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