Mullard ECC 32/CV181

Best pair what you can buy
Mullard CV181 =ECC 32
- black base - black plates  - upside down platter shape getter
NOS 1950´s -new - never used
comes from the stock by  german broadcast engineer Alfred Bokrand

test data presented below, it gives data for anode current, Ia and mutual conductance gm that is within nominal Mullard 100% emission spec:-

 

Test with Va = 250V         Vg = -4.6V 

Tube 1  Code  MLA

Section 1: Ia = 6.3 mA;     gm = 2.3 mA/V

Section 2: Ia = 6.0 mA;     gm = 2.3 mA/V

Tube 2 Code  MCA

Section 1: Ia = 6.5 mA;    gm = 2.5 mA/V

Section 2: Ia = 6.8 mA;    gm = 2.4 mA/V

The specification for a new/100% emission valve is:

Ia =6.0mA; gm = 2.3mA/V

As you can see, these results show a strong device with extremely good matching of each triode section within each valve envelope.

please think it over:
if you listen to music for 3 hours every day, there are 1,095 hours per year. The tubes have a lifetime of 10, 000 hours. So you can enjoy your music with it for 9 years. Share now the purchase price of 580 GBP through 9 years = 64 GBP per year, divide now 64 GBP 365 days = that is 0.17 GBP per day for 3 hours of music enjoyment.
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