1965 Supro S6420 Thunderbolt Amplifier
No Sales Tax For Customers Outside Of California.
This Supro S6420 Thunderbolt came to us with a changed speaker, so we dropped in a Jensen C15N from 1966 to round out what was otherwise one of the nicest Thunderbolts I've found. For some reason, every one we've had prior has been beat up, changed, and somewhat mistreated.
The amp has been responsibly serviced, with some internal caps updated and a grounded power cable added.
It sounds tremendous and it breaks up as expected with full range response from the 15" speaker. Higher volume bursts with an open low E vibrate the grill against the internal cross supports in the baffle. I experimented with a shim (a small piece of cardboard) between the grille and the baffle, which mitigated the noise. I removed it after testing. I suppose all Thunderbolts do this as the baffles are all the same. I had never noticed it and I've never seen it advertised.
Legendary tone in a portable package with classic looks - such a great amp!
Case/Cover?: No
Dimensions: W24" x H19.5" x D11"
Weight: 40 lbs
Watts: 35 Watts
Date: 1965
Where date is noted: Pots, Transformers
Speaker 1 Brand/Model: Jensen C15N
Speaker 1 Size: 15"
Speaker 1 Cone: Original
Power Transformer brand and/or codes: E3738A / 5246517
Output Transformer brand and/or codes: T3778 / 5246544
Extension Speaker Out? NO
FX Loop?: No
Reverb or other effects?: No
Rectifier Tubes: GT5U4
Rectifier Tube Brand: GT
Power Tubes: 2 x 6L6
Power Tube Brand: Svetlana
Preamp Tubes: 2 x 12AX7
Preamp Tube Brand: ?
Filter Caps: Original
Pedal: No
Pots, Codes: 137 6541
Tolex: Original
Grille: Original
Knobs: Original
Handle: Original
Power Cord: Updated 3 prong
Notes:
Shipping policy:
Shipments will require signature on delivery, no exceptions. If there is damage, the buyer must retain all packing materials intact and picture them immediately and send them to sales@maharsvintageguitars.com. Less than 1% of our shipments are damaged in transit, and we are committed to making sure your item arrives safely, but we are taking these additional measures to make sure you are happy with your purchase.
Buyer to pay prior to shipment via Paypal, wire transfer, credit card or other electronic means. Payment must clear before shipping. Certified checks and trades are accepted, however checks must clear before we will ship and trades must be received here and evaluated prior to shipment of our item.
All orders ship within three business days of the receipt of an order, usually faster. Tracking information will be automatically forwarded to all buyers. Buyers must retain all shipping materials in the event a return is necessary.
Returns accepted if the purchaser responds within 48 hours of receipt of an item and there is a discrepancy relating to the condition or originality of an item. Returns are not accepted for items that do not meet the needs or sonic tastes of clients due to the subjective nature, unless such concern is stated prior to the purchase. Any return for reasons other than incorrect advertising of condition or originality on the part of Mahar's Vintage Guitars shall be the responsibility of the buyer, which shall result in the buyer paying all shipping costs (to and from) their location.