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Fender Bandmaster TFL5005D Rectifier
Fender Bandmaster TFL5005D Rectifier
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Old 7th February 2020, 12:33 PM   #1
Carlosraj is offline Carlosraj  United Kingdom
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Default Fender Bandmaster TFL5005D Rectifier

Hi


The rectifier tube GZ34s for this amp has shorted. Can I use IN4007 diodes as rectifier to replace the tube.


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Old 7th February 2020, 02:31 PM   #2
JonSnell Electronic is offline JonSnell Electronic  United Kingdom
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You could but the HT will rise but the main smoothing is rated at 525volts so should be OK.
Why not fit a new GZ34 or 5U4, keeps it original.
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Old 8th February 2020, 11:30 AM   #3
Carlosraj is offline Carlosraj  United Kingdom
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Quote:
Originally Posted by JonSnell Electronic View Post
You could but the HT will rise but the main smoothing is rated at 525volts so should be OK.
Why not fit a new GZ34 or 5U4, keeps it original.

Yes, I think I will source for a new GZ34.


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Old 8th February 2020, 11:36 AM   #4
Zung is offline Zung  Switzerland
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Quote:
Originally Posted by Carlosraj View Post
Yes, I think I will source for a new GZ34.
...
Wise choice, else you'll change the tones.
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Old 8th February 2020, 11:44 AM   #5
JonSnell Electronic is offline JonSnell Electronic  United Kingdom
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I notice the original rectifier valve was a 5U4G. The anode current is slightly higher with the 5U4 but it is directly heated (a bright emitter) so will provide HT slightly quicker than the GZ34. Otherwise they are similar and are interchangeable.
The 5AR4 is a nice substitute as well.
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