When I connect the 90 volt and 9 volt batteries to the radio the amplifier works fine. But it will receive nothing. When I operate it on AC it works perfectly. What should I check? The 1L6 tests good. I tried boosting the 90 volts with an additional 9 volt battery but it still receives nothing. I tried a 1R5 to see if that works for the BC band but it doesn't work either. But if I connect something to the phono input it works fine on batteries. This is odd. These radios always work well on batteries. Please help.
Thanks,
Dave
If I connect the 9 volts on the other side of the 100 ohm resistor, then the radio works. If I use the 100 ohm resistor that's inside the battery connector, I only get 4.5 volts for the fliaments. That's not enough. The resistor measures 114 ohms instead of 100 ohms. If it's not a current limiting resistor, what else would it be for?
Could the resistor still have a problem even though it measures 114 ohms?
Thanks,
Dave
:Hello All,
: When I connect the 90 volt and 9 volt batteries to the radio the amplifier works fine. But it will receive nothing. When I operate it on AC it works perfectly. What should I check? The 1L6 tests good. I tried boosting the 90 volts with an additional 9 volt battery but it still receives nothing. I tried a 1R5 to see if that works for the BC band but it doesn't work either. But if I connect something to the phono input it works fine on batteries. This is odd. These radios always work well on batteries. Please help.
:
:Thanks,
:
:Dave
Does the original battery have something that connects to the free end of the 100 ohm resistor other than + A? Does someone have a schematic of the battery? I always thought that it was a 90 volt battery and a 9 volt battery. I also thought that the 9 volt battery connects to the free end of the 100 ohm resistor and the 100 ohm resistor is a current limiting resistor. I can see that this is not the case. So if someone had the schematic for the battery it would answer a lot of questions.
Thanks,
Dave
:Hello Again All,
: If I connect the 9 volts on the other side of the 100 ohm resistor, then the radio works. If I use the 100 ohm resistor that's inside the battery connector, I only get 4.5 volts for the fliaments. That's not enough. The resistor measures 114 ohms instead of 100 ohms. If it's not a current limiting resistor, what else would it be for?
: Could the resistor still have a problem even though it measures 114 ohms?
:
:Thanks,
:
:Dave
::Hello All,
:: When I connect the 90 volt and 9 volt batteries to the radio the amplifier works fine. But it will receive nothing. When I operate it on AC it works perfectly. What should I check? The 1L6 tests good. I tried boosting the 90 volts with an additional 9 volt battery but it still receives nothing. I tried a 1R5 to see if that works for the BC band but it doesn't work either. But if I connect something to the phono input it works fine on batteries. This is odd. These radios always work well on batteries. Please help.
::
::Thanks,
::
::Dave
The other theory I have is that resistor may be used for voltage dropping when run on A/C Power. It would seem to be that A/C powe has to drop the voltage somehow to run the lower voltage tube fillaments.
:Hello All,
: When I connect the 90 volt and 9 volt batteries to the radio the amplifier works fine. But it will receive nothing. When I operate it on AC it works perfectly. What should I check? The 1L6 tests good. I tried boosting the 90 volts with an additional 9 volt battery but it still receives nothing. I tried a 1R5 to see if that works for the BC band but it doesn't work either. But if I connect something to the phono input it works fine on batteries. This is odd. These radios always work well on batteries. Please help.
:
:Thanks,
:
:Dave
Best to check all the voltages, beginning at the RF end of the set. (The audio seems to be working OK.) Make sure the oscillator is running on battery power.
Doug
:According to http://www.batpack.com/ which is a website that sells reproduction A/B Battery Holders made for Tube Radios, that the 600 series has an extra battery (Z-1) for the Dial Light. Possibly this is the reason for the weird connections.
:
:The other theory I have is that resistor may be used for voltage dropping when run on A/C Power. It would seem to be that A/C powe has to drop the voltage somehow to run the lower voltage tube fillaments.
:
:
::Hello All,
:: When I connect the 90 volt and 9 volt batteries to the radio the amplifier works fine. But it will receive nothing. When I operate it on AC it works perfectly. What should I check? The 1L6 tests good. I tried boosting the 90 volts with an additional 9 volt battery but it still receives nothing. I tried a 1R5 to see if that works for the BC band but it doesn't work either. But if I connect something to the phono input it works fine on batteries. This is odd. These radios always work well on batteries. Please help.
::
::Thanks,
::
::Dave
I have that schematic but it doesn't show the battery schematic. It only shows the battery connector with the "hanging" end of the 100 ohm resistor. Battery replacement sites don't tell you what the insides of the battery look like. But it would be interesting to know what was inside one of them.
Thanks,
Dave
:Dave: Here's the schematic, which shows voltages throughout the set: http://www.transoceanic.nostalgiaair.org/600/B600.pdf
:
:Best to check all the voltages, beginning at the RF end of the set. (The audio seems to be working OK.) Make sure the oscillator is running on battery power.
:Doug
:
::According to http://www.batpack.com/ which is a website that sells reproduction A/B Battery Holders made for Tube Radios, that the 600 series has an extra battery (Z-1) for the Dial Light. Possibly this is the reason for the weird connections.
::
::The other theory I have is that resistor may be used for voltage dropping when run on A/C Power. It would seem to be that A/C powe has to drop the voltage somehow to run the lower voltage tube fillaments.
::
::
:::Hello All,
::: When I connect the 90 volt and 9 volt batteries to the radio the amplifier works fine. But it will receive nothing. When I operate it on AC it works perfectly. What should I check? The 1L6 tests good. I tried boosting the 90 volts with an additional 9 volt battery but it still receives nothing. I tried a 1R5 to see if that works for the BC band but it doesn't work either. But if I connect something to the phono input it works fine on batteries. This is odd. These radios always work well on batteries. Please help.
:::
:::Thanks,
:::
:::Dave
The Z-1 battery is a separate connector, that has nothing to do with the main battery. So that's not it. But thanks anyway.
Dave
:According to http://www.batpack.com/ which is a website that sells reproduction A/B Battery Holders made for Tube Radios, that the 600 series has an extra battery (Z-1) for the Dial Light. Possibly this is the reason for the weird connections.
:
:The other theory I have is that resistor may be used for voltage dropping when run on A/C Power. It would seem to be that A/C powe has to drop the voltage somehow to run the lower voltage tube fillaments.
:
:
::Hello All,
:: When I connect the 90 volt and 9 volt batteries to the radio the amplifier works fine. But it will receive nothing. When I operate it on AC it works perfectly. What should I check? The 1L6 tests good. I tried boosting the 90 volts with an additional 9 volt battery but it still receives nothing. I tried a 1R5 to see if that works for the BC band but it doesn't work either. But if I connect something to the phono input it works fine on batteries. This is odd. These radios always work well on batteries. Please help.
::
::Thanks,
::
::Dave
Here's an interesting version of the schematic:
It shows the 100 ohm resistor in series with the two batteries. I have the resistor hanging right now and it works.
I'm puzzled.
Dave
:Stephen,
: The Z-1 battery is a separate connector, that has nothing to do with the main battery. So that's not it. But thanks anyway.
:
:Dave
::According to http://www.batpack.com/ which is a website that sells reproduction A/B Battery Holders made for Tube Radios, that the 600 series has an extra battery (Z-1) for the Dial Light. Possibly this is the reason for the weird connections.
::
::The other theory I have is that resistor may be used for voltage dropping when run on A/C Power. It would seem to be that A/C powe has to drop the voltage somehow to run the lower voltage tube fillaments.
::
::
:::Hello All,
::: When I connect the 90 volt and 9 volt batteries to the radio the amplifier works fine. But it will receive nothing. When I operate it on AC it works perfectly. What should I check? The 1L6 tests good. I tried boosting the 90 volts with an additional 9 volt battery but it still receives nothing. I tried a 1R5 to see if that works for the BC band but it doesn't work either. But if I connect something to the phono input it works fine on batteries. This is odd. These radios always work well on batteries. Please help.
:::
:::Thanks,
:::
:::Dave
I see I have solved my problem and I hope that this helps others. If the connector is held so that the widely spaced holes are on the left, B+ is on top and B- is on the bottom. On the right, the closely spaced holes, A+ is on top and A- is on the bottom. The two batteries are in series.
The B600 now plays beautifully on batteries.
Thanks,
Dave
:Hello Again,
: Here's an interesting version of the schematic:
:
:
:
:It shows the 100 ohm resistor in series with the two batteries. I have the resistor hanging right now and it works.
:
:I'm puzzled.
:
:Dave
:
::Stephen,
:: The Z-1 battery is a separate connector, that has nothing to do with the main battery. So that's not it. But thanks anyway.
::
::Dave
:::According to http://www.batpack.com/ which is a website that sells reproduction A/B Battery Holders made for Tube Radios, that the 600 series has an extra battery (Z-1) for the Dial Light. Possibly this is the reason for the weird connections.
:::
:::The other theory I have is that resistor may be used for voltage dropping when run on A/C Power. It would seem to be that A/C powe has to drop the voltage somehow to run the lower voltage tube fillaments.
:::
:::
::::Hello All,
:::: When I connect the 90 volt and 9 volt batteries to the radio the amplifier works fine. But it will receive nothing. When I operate it on AC it works perfectly. What should I check? The 1L6 tests good. I tried boosting the 90 volts with an additional 9 volt battery but it still receives nothing. I tried a 1R5 to see if that works for the BC band but it doesn't work either. But if I connect something to the phono input it works fine on batteries. This is odd. These radios always work well on batteries. Please help.
::::
::::Thanks,
::::
::::Dave
I had a better schematic of that set and was marking up the power distribution of the battery operation aspect operation of the
set but had a Cable / Internet failure, so here it is now , and just might help out others in the future.
I see the cryptic little numbers of of a Military training manual on your submitted reference…here it is, in toto …for viewing by any others.
On this HOT linking:
http://www.extremenxt.com/theory.htm
That naturally is the training manual for the R-520/URR mil set. Which is a very good reference for the basic operation of the unit, particularly in the RF aspects.
In it, if you will consult BOTH Figs 24 and 25 you will get the filament distribution, but you will have to note that they do not use both the symbol of a chassis ground and the commonly recognized ground symbol…but you can see the switches shorting circuit made at the bottom of Fig 25 to the right and left of the 330K resistor.
BTW…in your just referencing just fig 24 which you submitted, you would wonder how the juncture of the A and B batteries and the 100 ohm resistor ever got over to the tube filaments, (I can’t see the 100 ohm resistor even being in circuit, and of any import on my reference schematic)…one needs to consult fig 25 also.
Plus, the yellow mark up area of the activate on command dial light circuit shows use of its dedicated battery supply.
Also, that offered battery pack……One hunna Amelican Dollah…. seems to be just a connector plug, wire for interconnects and some battery holders and a double fold card board box housing, but somehow, one might also expect some Masonite / plywood infrastructure…what with that appliance repairman (Engine-ear) standing atop it……….
Submitted.... marked up schematic of B600 power supply circuitry :
73's de Edd