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On Feb 15, 9:15*pm, "hmtavella" wrote:
Heriberto, see below in your text [interpreted to the best of my ability] [i] Hi Roger:- * * * * * * * * Answer part by part:- * * * * *1) If the receiver was no[t] modified, the outp[u]t transformer for phones s L30.- In some receivers modif[ied] [it is] replaced by one R of 100 k and [a terode tube is used]. e.g. 6v6 or 6K6 for the AF amplifier. Thanks, yes, I found L30 at last! Very small and almost hidden. A 100K resistor wil no work witha 6K6 here - too high. You need a 5K to 4 (or 8) ohms output transformer for a speaker. I did this on my BC348. Also, with a 6K6 where is the audio detector? I plan to replace it with the original 6R7 and use an external amplifier. * * * * *2) I have many years [of] working [on] one R-1155 *with the following tubes: 6K8 or 6J8 The converter, OK. 6k7 in IF amplifier RF pentode, top cap grid. OK 6R7 or 6Q7 in second detector and 1st. audio OK, same as mine. I have both in stock. In the magic eye can be a *EM34 european tube. I'll look for a NA type substitue. * * *3) Yes,the IF is 560 Khz. Will be adjusted warning the traps. Yes, from VMARS. 4) The double triod[e] (V9) is CV1102, or BL63, [I do] not know [a] replace[ment] [in an] american type. It is not neccesary for the amateur use. Agreed, I won't be using it. *I hope *was be useful for you. Yes, very, thanks. Excus[e] my bad [E]nglish Don't worry, all corrected above... I hope! Regards Heriberto (snip) Cheers, Roger |
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