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BY228 1500V 5A diode rectifier pack of 4 diodes for high power valve amplifier
Cheaper Than eBay
BY228 1500V 5A diode rectifier pack of 4 diodes for high power valve amplifier

BY228 1500V 5A diode rectifier pack of 4 diodes for high power valve amplifier

£3.79
Ship to United Kingdom : £2.49
Total : £6.28

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  • Condition : New
  • Dispatch : 2 Days
  • Brand : None
  • ID# : 221942521
  • Barcode : None
  • Start : Sat 25 May 2024 09:47:29 (BST)
  • Close : Run Until Sold
  • Remain :
    Run Until Sold
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Seller's Description



This is a pack of 4 heavy duty 5 Amp 1500 Volt rectifier diodes suitable for use as a bridge rectifier in very high power Valve Amplifiers where the HT B+ voltage exceeds 600V. Rated at 5A maximum average current at an ambient temperature of 75C. You may also use these diodes in lower power amps where their high stability and rugged construction makes them a great alternative to a valve rectifier.
Marshall style gold knob


Your amp runs cooler!

When used in guitar or hi-fi valve amplifiers this diode will provide a robust and long lasting low power consumption alternative to Valve rectifiers and can be soldered directly across the appropriate pins on the valve rectifier socket (two diodes required to replace a typical double diode valve rectifier, four required for a full bridge rectifier with transformers with secondaries with no grounded centre tap). Use of solid state diodes will reduce the load on your power transfomer by as much as 20 Watts compared with a heater current thirsty and inefficient valve rectifier! 

It may also be advantageous to solder a suitably rated 0.01uF capacitor across each diode as the very fast switching of solid state diodes can otherwise cause spikes on the B+ HT rail.

 

More Power out!

Note that if you do replace a valve rectifier with solid state diodes you will probably end up with between 10V and about 40V more on your HT supply compared with before... which should give more output power and headroom but may require rebiasing your output valves. Do give some thought to other component voltage ratings... 400V capacitors can be easily changed for 630V capacitors for peace of mind!

 

Sag Resistor for Guitar Amps

If you want to change to diodes and improve reliability without losing the characteristic soft sound a valve rectifier contributes towards a guitar amp when you overdrive it, you can fit a high power wirewound resistor (from 100 Ohms to 330 Ohms at 20W) in series with the diode rectifier output before the first main smoothing capacitor, at the expense of burning some of that saved power as heat instead of sound!

 

Supplied as a pack of 4 diodes.






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Listing Information

Listing TypeGallery Listing
Listing ID#221942521
Start TimeSat 25 May 2024 09:47:29 (BST)
Close TimeRun Until Sold
Starting BidFixed Price (no bidding)
Item ConditionNew
Bids0
Views25
Dispatch Time2 Days
Quantity2
LocationUnited Kingdom
Auto ExtendNo

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