FDP Home Page / FDP Forum / FAQ's

The FDP is made possible by the following companies and individual members like you.
Please use the links below to show them we value their sponsorship.

MOD KITS DIY

Apex Tube Matching

Musician's Friend

Antique Electronics Supply

Guitar Center

WD Music

Yellowjackets Tube Converters

Jensen Loudspeakers

Amazon

Sweetwater

Amplified Parts


* God bless America and our men and women in uniform *

* Illegitimi non carborundum! *

If you benefit and learn from the FDP and enjoy our site, please help support us and become a Contributing Member or make a Donation today! The FDP counts on YOU to help keep the site going with an annual contribution. It's quick and easy with PayPal. Please do it TODAY!

Chris Greene, Host & Founder

LOST YOUR PASSWORD?

......................................................................

   
FDP Jam
Calendar
Find musicians
in your area!
  Search the Forums  

FDP Forum / Amp Mods, Repairs, and Projects / T'shooting Question - dual channel 40 watt VM Band-Master

Rebrecs

USA/Texas

Mar 11th, 2017 05:10 PM   Edit   Profile   Print Topic   Search Topic

Hope someone here can help. The fender site doesn't acknowledge the existence of this amp. Fender VM Band-Master.
Two channel 40 watt tube amp with some effects gadgets.
The clean channel started hissing. Happens with or without anything plugged in. The OD channel is fine.
The discovery -- I took the face off expecting to change a 12AX7 or something for clean channel and found there is one set of tubes for both channels.
That's a new one for me.. naturally they wouls both use the power tubes. But the pre's ?

The question - how likely is it that a tube is the culprit when the symptom only shows up in one channel? Stated another way, are the clean and OD channels so different that a tube induced hiss would appear in one and not the other ?

Thanks in advance -- any tips are appreciated

swampyankee
Contributing Member
**********
*

olde New England

If you can't play good, play loud
Mar 11th, 2017 06:07 PM   Edit   Profile   Print Topic   Search Topic

I gig a Bandmaster VM. Head-cab version of a Deluxe VM.
The clean channel is solid state running through the DSP effects, outputting through the 6L6 power stage. Not sure where the hiss might be coming from. You could search earlier posts for info on either the BMVM or Deluxe VM.

My earlier thread with some good info and link to schematic

(This message was last edited by swampyankee at 08:24 PM, Mar 11th, 2017)

reverendrob
FDP Data Goon
Moderator

We all want

our time in hell
Mar 12th, 2017 12:34 PM   Edit   Profile   Print Topic   Search Topic

When in doubt, swap tubes.

If that solves the problem, boom!

It *should* be step one on any tube amp troubleshooting list!

Rebrecs

USA/Texas

Mar 13th, 2017 05:11 AM   Edit   Profile   Print Topic   Search Topic

Thanks swampyankee,
There is a link to the schematic on Steve Dallman's reply, however, fender has removed the page that the link points to (sigh)
I'm going to call their support phone number today. If for nothing else than to provide them with the painful reminder that they made and sold this amp.

So, the clean channel is an imposter. That is disappointing news, and goes far in answering questions about some other weirdness I noticed.

ps... what is a Swamp Yankee ? (smile)

swampyankee
Contributing Member
**********
*

olde New England

If you can't play good, play loud
Mar 14th, 2017 01:32 PM   Edit   Profile   Print Topic   Search Topic

Before i bought my BMVM, I did alot of googling for info, reviews, discussion, etc. Despite what i found (not the highest opinions and it being orphaned by Fender), i bought mine anyway. I figured it had features i wanted for gigging, and it was cheap enough, bought used.

A swamp Yankee is basically a New England redneck. It's a reference to my residence in rural towns here in New England, one of which is in fact, 30% swamp.

Another forum link with some troubleshooting and good schematic links

(This message was last edited by swampyankee at 03:50 PM, Mar 14th, 2017)

FDP Forum / Amp Mods, Repairs, and Projects / T'shooting Question - dual channel 40 watt VM Band-Master




Reply to this Topic
Display my email address             Lost your password?
Your Message:
Link Address (URL):
Link Title:




Moderators: Chris Greene  Iron Man  reverendrob  

FDP, LLC Privacy Policy: Your real name, username, and email
are held in confidence and not disclosed to any third parties, sold, or
used for anything other than FDP Forum registration unless you specifically authorize disclosure.

Furtkamp.com 
Internet Application Development

Copyright © 1999-2017 Fender Discussion Page, LLC   All Rights Reserved