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turretslug · 7th Apr 2021, 5:56 pm

CV4055 is the trusty EL821/6CH6, a small power pentode used by the barrow-load in video-distribution and similar applications, broadly comparable to the ee-el eightyfour. (Don't take that too literally, different pin-out and bias requirement). CV4058 is the good ol' EC90/6C4 triode, CV4015 the EF92 vari-mu signal pentode. One of the appealing things about this neat little radio is the commonality of the valve types, perhaps with the exception of the CV395, a bit like a B8B version of the IO VR150 with ignition electrode.

7th Apr 2021, 5:56 pm	#11
turretslug Dekatron Join Date: Nov 2011 Location: Surrey, UK. Posts: 4,400	Re: MF/HF Receiver type R/75/WRDV/3550 CV4055 is the trusty EL821/6CH6, a small power pentode used by the barrow-load in video-distribution and similar applications, broadly comparable to the ee-el eightyfour. (Don't take that too literally, different pin-out and bias requirement). CV4058 is the good ol' EC90/6C4 triode, CV4015 the EF92 vari-mu signal pentode. One of the appealing things about this neat little radio is the commonality of the valve types, perhaps with the exception of the CV395, a bit like a B8B version of the IO VR150 with ignition electrode.