paul
when you get the tube adapters from garage1217 please note one important thing... the pins on the adapters are LONG... too long... you should insert the tube into the adapter first, then carefully insert the adapter into the mhdt tube socket only about 1/2 in, not much more... if you insert the adapter pins in all the way there is a chance that you can break a solder connection below, and then, once the adapter is removed there will be a lost connection on one of the tube socket pin solder joints to the pcb underneath...
when you get the tube adapters from garage1217 please note one important thing... the pins on the adapters are LONG... too long... you should insert the tube into the adapter first, then carefully insert the adapter into the mhdt tube socket only about 1/2 in, not much more... if you insert the adapter pins in all the way there is a chance that you can break a solder connection below, and then, once the adapter is removed there will be a lost connection on one of the tube socket pin solder joints to the pcb underneath...