Results 1 to 6 of 6

Thread: What do you offer in a service?

  1. #1
    Member bassetrox's Avatar
    Join Date
    Apr 2010
    Location
    North East, UK
    Posts
    25
    Thumbs Up/Down
    Received: 0/0
    Given: 1/0
    Rep Power
    0

    What do you offer in a service?

    Hi guys

    Hope I've posted this in the right place.

    For about a year I've been doing repairs alongside my full time R&D job. One of the things I offer is a 'service' and at various times I've taken this to mean various things, including biasing output stage, valve checking, replacing all reservoir caps, replacing bias cap, checking all signal paths, checking for loose or dry connections.

    Just wondered what those of you who make money as a tech include in your service. I have a separate service charge - the equivalent of two hours of my normal repair labour time but sometimes end up spending considerably longer.

    Thanks in advance for your help.

    R.

    EDIT:

    I guess what I'm saying is that I'm comfortable finding problems and fixing them, but I'm not sure what a reasonable level of preventative action is to give good value for a customer without wasting my time. My gut reaction is an 'if it ain't broke' philosophy - but people like to have their kit looked for peace of mind at even when there's no actual problem - I want to give them good value.

    0 Not allowed! Not allowed!
    Last edited by bassetrox; 10-21-2013 at 07:19 PM. Reason: clarifying

  2. #2
    Senior Hollow State Tech Bruce / Mission Amps's Avatar
    Join Date
    May 2006
    Location
    Denver, Colorado
    Posts
    3,045
    Thumbs Up/Down
    Received: 8/0
    Given: 0/0
    Rep Power
    17
    Wasting time:
    I frequently run well over my 30 mins to 2 hour shop time on average repairs and just consider it nonchargeable time... mostly for my peace though. I hate come backs.
    I always give my advice on status and the possibility of a problem at a later date.

    0 Not allowed! Not allowed!
    Bruce

    Mission Amps
    Denver, CO. 80022
    www.missionamps.com
    303-955-2412

  3. #3
    Senior Member
    Join Date
    Dec 2011
    Location
    Pretoria, South Africa
    Posts
    694
    Thumbs Up/Down
    Received: 8/0
    Given: 0/0
    Rep Power
    9
    Hi. What I do is see the "service" part of a job, as seperate from the actual repair.
    This icludes replacing missing knobs/ screws, checking for dry joints, retensioning tube sockets and cleaning of all controls/ switches. If it is a solid state power amp I will even measure the max RMS into various loads and write it down on a sticky placed on the amp somewhere. Customers love this.
    Just my 2cents

    0 Not allowed! Not allowed!

  4. #4
    Member bassetrox's Avatar
    Join Date
    Apr 2010
    Location
    North East, UK
    Posts
    25
    Thumbs Up/Down
    Received: 0/0
    Given: 1/0
    Rep Power
    0
    Thanks Bruce, diydidi,

    My standard is to bias the amp, check pots for crackles and clean if needed, check connectors and clean or replace if needed, check for cooked looking screen grid resistors and bulging or leaky caps, clean valve bases and then check all signal paths.

    I'll record the power delivery into 4R too, though just into that one load, unlike diydidi.

    I guess my main question is whether there is anything that you guys who've been doing this for ages (rather than on and off since 2010 like me...) would replace as a matter of course? Or if there's anything else you guys think I should do as standard?

    I'm not really worried about running over 30mins here or there, but I wouldn't want to be doing anything unnecessary like replacing perfectly fine caps either, as I don't think it's in the customer's interests.

    Thoughts?

    0 Not allowed! Not allowed!

  5. #5
    Senior Hollow State Tech Bruce / Mission Amps's Avatar
    Join Date
    May 2006
    Location
    Denver, Colorado
    Posts
    3,045
    Thumbs Up/Down
    Received: 8/0
    Given: 0/0
    Rep Power
    17
    I do this to most all amps but especially if I have older amps such as a 60's-70's Fender amps, which are still VERY popular gigging amps here in Denver...
    I will almost always replace the bias filter cap with a new one, (bad deal if it fails or allows some ripple or not enough negative voltage...and a cheap security repair), then check all the main filter caps for venting or puked ends, check for AC ripple on the center of the OT, clean ALL the pots, including the bias pot, then relube them, loosen and then re-tighten the input jacks to insure good ground into the brass plate, run a de-burring stick through their contacts, check the idle current of the power tubes and if needed, adjust to a reasonable level and then run a 100mvac signal into all channels to see on my scope what the max clean output power is into a "dummy load" of the correct impedance.
    Then plug the speaker load in and see how it sounds.
    If the clean output power it isn't within 75%-80% of what it should be, I'll tell my customer to consider a new set of power tubes and if the Hi-V caps are crappy, I tell them I can't really fix the amp to be reliable and or of a "gigable" status unless they replace all the electrolytic caps too.
    Again this is part of my peace of mind.... but, it's 100% their fault if they don't do what I recommend and there is no warranty repairs or labor discounts if anything else fails that I did not replace and or if they ignore my recommendations.

    0 Not allowed! Not allowed!
    Bruce

    Mission Amps
    Denver, CO. 80022
    www.missionamps.com
    303-955-2412

  6. #6
    Member bassetrox's Avatar
    Join Date
    Apr 2010
    Location
    North East, UK
    Posts
    25
    Thumbs Up/Down
    Received: 0/0
    Given: 1/0
    Rep Power
    0
    Quote Originally Posted by Bruce / Mission Amps View Post
    I will almost always replace the bias filter cap with a new one, (bad deal if it fails or allows some ripple or not enough negative voltage...and a cheap security repair), then check all the main filter caps for venting or puked ends, check for AC ripple on the center of the OT
    Thanks for the helpful thoughts Bruce.

    R

    0 Not allowed! Not allowed!

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Roland RD-700GX Service Notes request - service manual
    By ivanhoe in forum Schematic Requests
    Replies: 19
    Last Post: 01-28-2020, 09:09 PM
  2. gaussmeter christmas offer....
    By -Elepro- in forum Pickup Makers
    Replies: 2
    Last Post: 12-10-2010, 06:17 AM
  3. Service charges
    By Rayme in forum Maintenance, Troubleshooting & Repair
    Replies: 11
    Last Post: 06-11-2009, 12:46 AM
  4. In need of service manual
    By TedinOttawa in forum Schematic Requests
    Replies: 1
    Last Post: 05-11-2009, 11:19 PM
  5. Field service cancelled
    By Enzo in forum Music Electronics
    Replies: 47
    Last Post: 01-16-2007, 05:16 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •