Ken: Do not give up now. Sice you have it free rotating,and out of tha chassis connect some junper and try it checking the output signal of the SB-102. If negative results, try to find a LMO from an SB-101 or SB-100 that fits the same that uses a 6AU6 and some claim is better. this I do not know, but the SB-101 and SB-100 that I have work very good.. Frank/WB4EHB