Specifications

Wheatfield AudioWheatfield Audio HA-1 Owners ManualHA-1 Owners Manual
8/30/00 Page 6
Replacing Tubes
Tubes don’t last forever, so you can expect to replace the tubes from time to time. We
have operated the HA-1 for more than 2500 hours, with no noticeable degradation of the
tubes. We expect that the tubes will last between 4,000 and 10,000 hours before needing
replacement. That’s about an hour of listening per day, for ten to twenty years.
Of course, your mileage may vary. If you do notice degradation of the sound, or a
lowering of the volume, it may be time to replace the tubes.
You can replace the tubes yourself. Just find a high-end Hi-Fi shop that sells tubes, or
look on the internet – there are a number of companies that sell tubes on-line for very
reasonable prices.
You don’t have to use tubes made by the same manufacturer as those shipped with the
amplifier – any tube with the same type number is OK. Certain equivalent replacement
types are fine, too. For example:
7044 can be replaced with 7119, E182CC
ECC82 can be replaced with 12AU7, 12AU7A, 5814, 6189, CV4003
Wheatfield Audio’s Warranty
Your HA-1 amplifier is warranted to be free of defects for a period of one year after you
receive it. If anything fails during that time, including the tubes, we will fix it for free.
Contact the dealer from which you bought the HA-1 for directions on how and where to
return it.
After the one year warranty period, contact the dealer that sold you your HA-1 if you
have a problem. He can either fix it or arrange to get it back to us to fix.