GZ37 MULLARD TUBE RECTIFIER Made in GT.Britain Amplitrex Tested 1MP #859008/12
Tested Advance Digital Tube Tester Amplitrex AT1000 Sr.No. 859008 A FWD=6v A REV=407v. NOS GZ37 Mullard. Amplitrex AT1000 Advance Digital Tube Tester, Hickok 752a tube tester, AVO Type 160. Brown base, clear glass.
