[Boatanchors] RME 45 receivers need HELP !!

[Bob W5UQ]

could not resist telling you this.  When I was about 14 years old, say 
about 1954, I had an RME45.  The sweeping dial was so neat in my young 
eyes.  I remember getting my general license and working 20 meter DX 
with it.  WOW...
Then some how I talked my mom into getting me a National NC183D.  Now 
that was even better.  It had two sweeping dials on it.

I have an NC183D ....again now...   sometimes I wonder if I oughtta get 
me another RME45.
Hmmmmmm...  we'll see.

Bob Hardie
W5UQ
Ex WN5EUQ and W5EUQ...

and the beat goes onnnnnnnnn!!!!

Remember that an airplane has to
turn into the wind to take off.
It's the push against that what resists you
that can help you succeed.

"Faith is not about everything turning out OK;
Faith is about being OK no matter how things turn out."

The Main thing...
is to keep the main thing,
the main thing.

Just my "two Bobs worth".

See W5UQ.com Website.
QRZ.com is accurate for W5UQ
and for A25UQ,V31UQ, VP2EEU&  ZF2UQ.

July 2011, Bill, W5SJ, and I
had a blast in the Caymans.
He was ZF2EZ and I was ZF2UQ.





On 10/20/2011 4:38 PM, John King wrote:
> I have two RME 45 receivers on my bench which I believe to be RME 45B models. However, I am not sure which ones they are.
>
> They are Serial number SG 87 B
> and
>                Serial number CH 53 B
>
> I have number SG 87 B working to an extent. It is receiving signals well on the AM broadcast band, the Short Wave band in the 5mhz to 7mhz, WWV at 16 mhz and the citizens band. It may be receiving signals throughout the entire 530 khz to 30 mhz bands. I just haven tuned them all carefully. The main thing wrong with it, at this time, is that the BFO doesn't work. I have recapped the receivers but now wish to get the Beat Frequency Oscillator working. It receives CB band well for an "old tube receiver".
>
> I have all manuals and schematics that are on the BAMA web site. I also have the Sams Photofact. The receiver without the BFO  isolating has the following tube line up:
>
> 7B7, RF amplifier 
> 7B7 converter
> 7B7 1st IF
> 7S7 2nd IF
> 7B6 BFO
> 7A6 2nd detector  automatic noise limiter
> 7C7 1st audio amplifier
> 7C5 output amplifier
> 5Y3 rectifier ( may have been changed by previous owner)
> VR150 regulator
>
> This receiver came with a 7C&  in place of the 7B7 and a 7A6 as a second detector but the receiver doesn't work with that tube lineup.
>
> I am not sure the above tube line up is correct, but the receiver is working reasonably well EXCEPT THE BEAT FREQUENCY OSCILLATOR.
>
> RME 45 number CH 53 Bis not working well at all ....just making hiss and strange sounds. I am not sure what the tube line up should as it has NO tube location and nomenclature tag inside and is missing.
>
> If you have RME 45s with very close serial numbers, please provide me with information if you can. I am very close on SG 87 B, I just need to get the BFO working.
>
> The identification of which serial number is which B model and not knowing which schematic is applicable to each makes the situation very confusing. Any experience with these old receivers will be appreciated if you can share it. Thanks and 74, John, K5PGW
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