Question about HHB Radius 50 Tube Amplifier

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Volume problem with BV120 tube head

I own an older Crate BV120.  There is something
wrong with it.  I also own a Peavey XXX and a Peavey 6505 and i believe
all three of my heads are 120 watt all tube heads.  But my Crate head is
ALOT quieter than the other heads.  Good example my crate head turned
up to 7 or 8 matches both my 6505 and XXX at around 2 or 3.  I am sure
something is wrong with and i have own many crate products and they all
worked great.  The BV120 is the only used head i have bought and i
really want to fix it.  And my experience with tube heads is definately
minimal.  I guess what i am asking is what could be wrong with my bv120
head and how do i go about troubleshooting the head myself?

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Re: volume problem with BV120 tube head

Hi.i suspect it is not faulty just built with different gain characteristics.only a power check with an oscilloscope will tell and any electronic repairer should do this for you very will also tell you how well and balanced the valves are.if you are near will do it for you nigel

Posted on Oct 29, 2007

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SOURCE: Crate BV120 too quiet

yes i just got one of these too and i was kind of pissed of when my friends little marshall mg was louder at 5 when mine was at 7?

Posted on Jan 17, 2008

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My peavey 3120 guitar amplifier head is not producing sound. no hiss or hum at any volume. all the indicating lights come on. all the tubes glow as they should. what is wrong?

HI.... I'm a tech AND guitar player. Tubes may light but not work.
Take it to a amp repair guy that has a tube tester
Otherwise you could spend BIG $$ on lots of tubes

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Do you have the Impedance switch set for the right cab?

Are you using a guitar cord to connect to speaker cab ?...If so, dont. Use a speaker cable.

Is the damping switch loose?

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I have an old crate blue voodoo amp head that wont work

Good day sir, changing the tubes won't solve the problem, sad to say it but you may need to bring it to a veteran technician, that knows tube amps. there are simply lots of things to check for. hope this helps, thanks

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Jul 18, 2009 | Peavey PV-3800 2-Channel Amplifier

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Hi robindahlia

for 240 volt operation it is 3 amp. May be a 5 amp in the US(110v). Best bet is to take the fuse with you when you go to get a new one. just be sure to get the same type. If it has a T next to the rating, it is a time lag type. This is the important bit.

good luck


Aug 03, 2008 | Amplifiers & Preamps

1 Answer

Peavey xxx stopped working during a show

Hi lespaul 2001

Have you checked your HT fuse. If it fails it will have lights but no sound. Pays to check fuses with a multimeter, as they sometimes look good, but can be dud.

A faulty or intermittent lead speaker box lead will aldo make the head blow fusesCheck the lead to your speaker box also. Dont use a stomp box patch lead. be sure to use a decent speaker lead with quality jacks(switch craft) and at least 16 gauge cable. Ernie Ball make a decent speaker lead for guitar rigs.

If the head keeps blowing fuses, I would suggest that you change you output tubes(4 x 6L6GC). I recommend Electro Harmonix, by Sovtek as a budget conscious option. Get them as a gain matched quartet.

If it does not have a blown fuse at all... then get back to me here and we can do some more tests.

I am more than happy to answer any other questions you may have about it, just give me a hoy :) If you are still unsure, or have problems, then before you give a rating for this advice, please get back to me and we can try some more things.
Thanks for using FixYa, If you consider the advice I have given you as sound, a FixYa rating is a great reward for my efforts to help you. Cheers.


Jun 16, 2008 | Amplifiers & Preamps

4 Answers

Dead peavey supreme XL amp head

I'm not a pro on amps but I have a Peavey Rage 158 amp, I'd suggest seeing if the speaker itself still works by directly connecting a source onto the speaker[take the wires off and hook it up to a source].

Try turning it on and checking the wattage going to the speaker wire, then follow the wire back and check the big coil with copper wire among other things.

A common problem with old amps are the tubes, check the tubes to see if they are burnt out [google it if you need a guide]
then check on ebay or maybe an electronic/guitar store.

If that didn't help, reply with more details

Good luck.

[If you don't want it ill take it off of you for $20 :p ]

Feb 01, 2008 | Amplifiers & Preamps

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Peavey xxl question....

You may have a loose connection inside either to a transistor or the power supply. If everything looks good, you may need a new transistor. You need to do an ohm test or AC test to pinpoint which resistor is at fault.

Oct 30, 2007 | Amplifiers & Preamps

2 Answers

Peavey classic 50/50 keeps blowing fuses.


I have a classic 50/50 as well and re-tubed it with JJ el84s, vintage teslas and mullard 12at7s. As long as you replaced it with EL84s, I can't imagine that the output would be increased enough to damage the OT. When I got my 6505 Combo, one of the 6L6s was bad, and it kept blowing fuses and howling like a banshee. I would think that an OT problem would result in a significant loss of output...or none at all. I've gotten DOA tubes from a few places. I would suggest swapping each tube out 1 by 1, until you find it...if that is indeed the problem...before you pay the cash to have it worked on.

Oct 28, 2007 | Amplifiers & Preamps

4 Answers

Crate BV120 too quiet

Have the tubes checked when good and warm.
Check for any leacking capacitors.
Check all solder joints are shiny any that are dull try to reheat and apply solder.
Good Luck

Oct 23, 2007 | HHB Radius 50 Tube Amplifier

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