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Monday, December 23, 2013

Tube Amplifier Upgrade

Tube Amplifier Upgrade

Attached below is one of the tube amplifiers sent to us for upgrade from a local user. It's probably not appropriate for us to mention the manufacturer name, so we will skip that. The origin of this tube amplifier is PRC.

It is a single ended 300B integrated amplifier. Due to limited budget, the upgrade was separated into 2 phase. The 1st phase was done and the user was happy enough that 2nd phase was called off. Below are some of the 1st phase modifications made to the amplifier.


Tube Amplifier Upgrade

2nd phase was plan to include - output transformer upgrade, volume pot change to stepped attenuator, source selector to be changed to Elma made, addition of EMI/RFI filter and also power switch change.

We shall see when the upgrade itch / worm resurfaces.


J&K Audio Design
24/12/2013

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* Finished amplifiers, DACs, audio gadgets, upgrades and repairs - this is not our core business and we do it out of passion. We do not have fixed models, fixed price and we customize for each individuals. The sky is limit of creativity.  
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Product Lists

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Level 0: link 1

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Level 3: depends on type, size and complexity. Email us for details.

Iso-trans: link 1, link 2

Power-trans: link 1

* Finished amplifiers, DACs, audio gadgets, upgrades and repairs - this is not our core business and we do it out of passion. We do not have fixed models, fixed price and we customize for each individuals. The sky is limit of creativity.

* Our product lines are always improving and increasing. If you do not see what you want, contact us!

* Please email for volume discounts, distributor and OEM pricing.

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