The power supply for tube rigs

2006/11/20

 

The power supply for tube rigs

 

As I am building tube QRP transmitters, I needed a power supply for tubes to run so that the rigs I build do not require a power supply section on the unit every time.   I had an old tube power supply unit that was perhaps used in the Canadian Army.  I decided to modify the unit to suit my use and requirement.

 

I drew a schematic drawing in April, 2005 and built one in the summer 2005.  The final modification was made in December. 2005 to be operable and meet my requirement.    The spec is as follows:

 

(1)   It had two systems, a high voltage and a low voltage systems.

(2)   Use the materials and parts on hand as much as I could. 

(3)   Provide heavy handles on the chassis for easy lifting because two power transformers on the chassis.

(4)   The high voltage: rectifier= 5U4G,   output= 400v (unregulated), 300v (regulated), 150v(regulated),   transformer= model 80B11(maker not known) red/red 798v, red/ct 398v, electrolytic capacitor= 40microF x 2 pcs @450v and a choke 10H.  voltage regulators =0C3,0A2, and 0A2.

(5)   The low voltage: rectifier= 5W4,   output=250v(not regulated).  transformer= model 80B12(maker not known) red/red 480v, red/ct 238v.  electrolytic capacitor=40microF x 2 pcs  @300v and a choke (the existing one on the chassis was used and not known for the capacity). 

 

I do not use this power supply often but every once in a while, I switch on to get power to run tube rigs.  It works well.

 

ve3cgc@cogeco.ca

hiro hayashi

 

 

In Japanese:

自作の真空管式リグ、主にQRPCW送信機ですが、作るたびに、電源をリグに組み込むと、パーツが手に入らず、リグ自身も作るのがつい、面倒になります。 2年程前に町の中古品マーケットで手に入れた、部品取りのためのラジオのなかに、カナダ軍のものと思われる古い(多分1950年から1960年代)電源がありました。  電源用のトランスは大きいのが二つ付いていて、手持ちの整流管を使えば、私が使うのには手ごろな電源が出来そうなので、20054月に配線図を書いて、年が終わる12月に出来上がりました。

 

スペックと留意点は次の通りです。

(1)   電圧の高い物と低い物と2系統組み込む。

(2)   手持ちの部品を出来るだけ使う。 真空管用の電源は部品が手に入りにくいためです。 シャーシー載っていた電解コンデンサーも使う事にしました。 不都合が出てきたら、新品の物と交換する覚悟でした。

(3)   二つのトランスが載っているシャーシーの重さは10キロ以上もあると思われたので、持ち良い様にしっかりしたハンドルを両側に取り付けました。

(4)   高い電源電圧部:真空管=5U4G、 出力=400V300V150V、 チョーク10H、電圧制御の真空管=0C3, 0A22本)。

(5)   低い電源電圧部:真空管=5W4、 出力=250V、 チョーク 容量不明

 

この電源はもう1年くらい使っていますが、結構調子は良く、1台あると便利です。

 

ve3cgc@cogeco.ca

hiro hayashi

 

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