Hi Roger:-
See the link: http://www.vmarsmanuals.co.uk/r1155/r1155.htm

I am also devoted R-1155A.-
Regards

Heriberto
LU6DBU
"Engineer" escribió en el mensaje
...
Hi, all.
I am comtemplating the refurbishing of an R1155 receiver (not sure
what model) - actually, not bought yet. Courtesy of the present
owner, it's just on the bench for evaluation. Unfortunately, it is in
rather rough shape, viz:
-- DF tubes missing (not really a problem)
-- Problem: Someone had started to install a 6K6 o/p tube in place of
the VR101/6R7 det/audio output tube and has screwed it up badly (Not
by present owner!)
-- I can't find the phones o/p transformer (designated L30) anywhere
in the chassis - not even the mounting holes!
-- I don't know where the audio detector diode circuit has gone! I
understand that V7 (a VR101/6R7) is the AVC detector and BFO osc. tube
and that V8 (same tube type, but missing in my set), is the det/AF
tube.
-- eye tube is present but almost totally faded on test.
-- I don't have any sockets for the front-of-set plugs (I'll do some
work around.)

All tubes test good and I've several spares. Dial is old style, i.e.
direct and 100:1, and works well.

Q1: Am I advised to replace the original det/AF tube and use an
extwernal amplifier to drive a speaker, or to complete a proper
replacement with a 6K6 and speaker OPT, adding a 1N34A point contact
RF diode as a detector (I've done the latter on a couple of vintage
commercial radio refurbishings.)

Q2: I have the schematic but would appreciate pointers to decent R1155
websites.

One last question (Q3): Is the IF 460 KHz or 560 KHz? I've seen
reference to both numbers.

My objective is to retore this set for BC and SW band listening with
an external power supply (which I have), audio amplifier (which I
have, that's if I don't pursue the 6K6 route) and a speaker (not
phones.)

Thanks for all replies and any other R1155 advice gratefully recieved.
Please also feel free to email me at "analogdino at(aboy) rogers dot
(ty as they) com" - suitably decoded!

Cheers,
Roger

On Feb 15, 6:18*pm, "hmtavella" wrote:
Hi Roger:-
* * * * * * * See the link: *http://www.vmarsmanuals.co.uk/r1155/r1155.htm

* * I am also devoted R-1155A.-
*Regards

Heriberto
LU6DBU
"Engineer" escribió en el ...

(snip)

Thanks Heriburto - bookmarked, and some pages printed for bench use.

-- I can't find the phones o/p transformer (designated L30) anywhere
in the chassis - not even the mounting holes!

Ah, ha..! I've found L30 from a VMARS sketch. I was looking for
something much larger, like a radio OPT. L30 is tiny and buried under
wires, etc!

One last question (Q3): Is the IF 460 KHz or 560 KHz? I've seen
reference to both numbers.

Ans: It's 560 KHz, from the VMARS website

(snip)

Do you, or does anyone else, have the equivalent commercial tube
(valve) type for the VR-types?
Here's what I have to date (hope the columns hold together):

Rec number VR-type Commercial
__________________________________________________ _
V1, V2, V4 VR99 6J8G (triode-heptode)
V3, V5, V6 VR100 KTW61 (NA type?) (RF pentode)
V7, V8 VR101 6R7, aka DH63 (dble-diode triode)
V10 (eye) VR?? ??
V9 VR?? ?? (double triode)

Thanks and cheers,
Roger

Hi Roger:-
Answer part by part:-
1) If the receiver was no modified, the outpot transformer for
phones es L30.- In some receivers modificated has reeplaced by one R of 100
k, and attached a tetrode tube i.eg 6v6 or 6K6 for the AF amplifier.-
2) I have many years working one R-1155 with the following tubes:
6K8 or 6J8, 6k7 in IF amplifier.- 6R7 or 6Q7 in seconddetector and 1st.
audio.- In the magic eye can be a EM34 european tube.-
3) Yes,the IF is 560 Khz. Will be adjusted warning the traps .-
4) The double triodo (V9) is CV1102, or BL63, not know reeplaced for the
american type. It is not neccesary for the amateur use.-

I hope was be useful for you.-
Excus me for my bad english

Regards
Heriberto

"Engineer" escribió en el mensaje
...
On Feb 15, 6:18 pm, "hmtavella" wrote:
Hi Roger:-
See the link: http://www.vmarsmanuals.co.uk/r1155/r1155.htm

I am also devoted R-1155A.-
Regards

Heriberto
LU6DBU
"Engineer" escribió en el
...

(snip)

Thanks Heriburto - bookmarked, and some pages printed for bench use.

-- I can't find the phones o/p transformer (designated L30) anywhere
in the chassis - not even the mounting holes!

Ah, ha..! I've found L30 from a VMARS sketch. I was looking for
something much larger, like a radio OPT. L30 is tiny and buried under
wires, etc!

One last question (Q3): Is the IF 460 KHz or 560 KHz? I've seen
reference to both numbers.

Ans: It's 560 KHz, from the VMARS website

(snip)

Do you, or does anyone else, have the equivalent commercial tube
(valve) type for the VR-types?
Here's what I have to date (hope the columns hold together):

Rec number VR-type Commercial
__________________________________________________ _
V1, V2, V4 VR99 6J8G (triode-heptode)
V3, V5, V6 VR100 KTW61 (NA type?) (RF pentode)
V7, V8 VR101 6R7, aka DH63 (dble-diode triode)
V10 (eye) VR?? ??
V9 VR?? ?? (double triode)

Thanks and cheers,
Roger

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

Hi Roger:-
The answering write at end of each item.-
Regards

Heriberto
LU6DBU



"Engineer" escribió en el mensaje
...
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? Answer: Not, the 6K6 is AF
amplifier only.-

I plan to replace it with the original 6R7 and use an external
amplifier. Answer;- OK Is a good option

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. Answer: And RF
Amplifier also


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