I've moved tube HiFi gear (tubes installed) 100's of times in cars and vans (for short distances) without mishap.
These were mainly Dynaco ST70's and MC30's being used as PA amps.
Same goes with tube guitar amps.
However, when doing so for long distances (Des Moines to Los Angeles) the power amps always needed to be re-biased.
Not certain I would still do so in the Los Angeles area due to the high % of BAD drivers and the need to lock ones brakes and/or take evasive manuevers.
DeKay
These were mainly Dynaco ST70's and MC30's being used as PA amps.
Same goes with tube guitar amps.
However, when doing so for long distances (Des Moines to Los Angeles) the power amps always needed to be re-biased.
Not certain I would still do so in the Los Angeles area due to the high % of BAD drivers and the need to lock ones brakes and/or take evasive manuevers.
DeKay